DOCSLIB.ORG

Papers 9Th International Drainage Workshop, September 10-13, 2003 Utrecht the Netherlands

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Papers 9Th International Drainage Workshop, September 10-13, 2003 Utrecht the Netherlands drainage_in.html Papers 9th International Drainage Workshop, September 10-13, 2003 Utrecht The Netherlands KEYNOTES TOPIC 1 TOPIC 2 TOPIC 3 TOPIC 4 KEYNOTES Simply click on the Title to view the Keynote. Type No. Authors Title Developing a Basin Framework for Prioritizing Investments in Water Resources Infrastructure in Keynote PA134 N. Bakker, Chu Tuan Dat, P. Smidt and C. Steley Viet Nam's Red River Basin Abdel-Dayem Safwat, Hoevenaars J., Mollinga P.P, Scheumann W., Slootweg R. and Keynote PA137 Agricultural Drainage:Towards an Integrated Approach Steenbergen F. van Keynote AB138 Reza Ardakanian Integrated Drainage and Irrigation in Arid and Semi-Arid regions TOPIC 1: INNOVATIVE DRAINAGE TECHNOLOGIES IN AGRICULTURE Subtopic 1.1 Soils and Installation Subtopic 1.2 More Crop per Drop and Controlled Drainage Subtopic 1.3 Decision Support Systems and Models Simply click on the Title to view a Paper. Type No. Topic Authors Title Discussion paper DP007 1,1 Julian Martinez Beltran Developments in drainage machinery and materials Paper PA001 1,1 Moukhtar M.M., El-Hadidy E. and El-Shewikh M.A.B. Drainage and Degrading Salty clay soil in Egypt Field-saturated hydraulic conductivity of unsaturated soils from laboratory Paper PA002 1,1 Rodgers M. and Mulqueen J. constant-head well tests Assessment of Laser Technology Application on The Performance of Subsurface Paper PA005 1,1 M.A. Omara Drainage Systems Subsurface drainage for the control of water logging in a pilot area in Nagarjuna Paper PA006 1,1 Srinivasulu A., Satanarayana T.V. and Hema Kumar H.V. Sagar right canal comand in South India http://library.wur.nl/ebooks/drainage/drainage_cd/drainage_topics.html (1 of 6)26-4-2010 12:10:20 drainage_in.html Paper PA009 1,1 Gehan A.H. Sallam Quality Control of Subsurface Drainage Projects Effect of Evaporation and Root Water Uptake on the Design of Subsurface Paper PA010 1,1 Abdel-Fattah M.M., Abdel-Ghany M.B., Amer M.H., Waheed O.S. and El-Saadany H. Drainage Systems in Arid Regions Determination of drainage parameters in the low-lying acid sulphate coastal Paper PA011 1,1 Mathew and Vos wetlands of Kerala, India. Paper PA012 1,2 Bakel, P.J.T. van Controlled Drainage in The Netherlands Revisited? Paper PA013 1,2 Bastiaanssen G.M. and Bos M.G. Using the depleted fraction to manage the groundwater table in irrigated areas Controlled watertable management as a strategy for reducing salt loads from Paper PA014 1,2 Hornbuckle J.W., Christen E.W., Ayars J.E. and Faulkner R. subsurface drainage under perennial agriculture in semi-arid Australia Problems and Perspectives of Projecting the Artificial Drainage in Arid Zone of Paper PA015 1,2 Inom Sh. Normatov Central Asia Paper PA018 1,2 Vlotman, W.F. and Jansen, H.C. Controlled Drainage for integrated water management Paper PA019 1,2 Wahba M.A.S, El-Ganainy M.A and Amer M.H. Water Table Management Strategies for Irrigation Water Saving Strategies for productive use of brackish water for sustainable food grain Paper PA021 1,2 M. H. Zia, Dr. A. Ghafoor and Th. M. Boers production in dry regions Influence of sub-surface drainage on rice crop yields in saline and water logged Paper PA022 1,2 Ratnam M., Lakshmi G.V. and Satyanarayana T.V. soils of Konanki and Uppugunduru pilot areas of Andhra Pradesh Paper PA023 1,2 El Sayed A., Hussam Fahmy and Abdel Gawad S.T. Impact of wastewater treated effluent reuse on Agriculture: A Case Study, Egypt Paper PA025 1,2 Stämpfli N. and Madramootoo Ch. A. Subirrigation: A technology for achieving more crop per drop Paper PA029 1,2 P.J. van Overloop Drainage Control in Water Management of polders Water Productivity in the Syr-Darya River Basin: Temporal and Spatial Paper PA132 1,2 Abdullaev I, Horst M., Mirzaev N. and Matyakubov B. Differences Effect of different irrigation water amounts on sugar beet yield and water use Paper PA136 1,2 El-Askari K, Melaha M, Swelam A. and Gharieb A.A. efficiency in Eastern Delta Paper PA033 1,3 Sallam G.A.H., Ghany M.B.A, Owais T.M., El Din W.O. and Abdel Ghany M.B. Expert System for Management of Heavy Clay Soils in Egypt Numerical Simulation of Water Table Variations in Subsurface Drains within Paper PA034 1,3 Fatahi Nafchi R. and Shayannejad M. Polders Paper PA035 1,3 Preecha Wandee Model for optimization water management in rice polders area in Thailand Paper PA036 1,3 M.A. Ragab Guidelines for Rehabilitation Planning of Subsurface Drainage Systems in Egypt Use of the drainmod and Mike 11 models in combination with GIS for simulating Paper PA037 1,3 El-Sadek A., Abdel-Gawad S. and Feyen J. the nitrate load at catchment scale http://library.wur.nl/ebooks/drainage/drainage_cd/drainage_topics.html (2 of 6)26-4-2010 12:10:20 drainage_in.html Paper PA038 1,3 Castanheira P.J. and Santos F.L. A finite element software for predicting water table height between parallel drains The decision-support system for the federal investment's planning at drainage Paper PA039 1,3 Yurchenko I. operation Paper PA041 1,3 P. K. Shrivastava, A. M. Patel and R. J. Oosterbaan SALTMOD model validation and application in Segwa minor canal command area Paper PA042 1,3 Ritzema H., Grobbe T., Chong T. and Wösten H. Decision Support System for Peatland Management in the Tropics Wang S.L., Prasher S.O., Kim S-H., Barrington S., Madani A., Macdonald P.M. and Evaluation of Swap-Manimea Models for Predicting No3-N Leaching from Hog Paper PA043 1,3 Robertson S.D. Manured Plots A Proposed Coupled Finite Element Model For Water and Heat Flow in Porous Paper PA044 1,3 Abdel-Fattah M.M., Faten F.M., Amer M.H. and El-Hossiny A.M. Media Hydraulic estimation of drainage discharge rate at sanitary landfill of communal Paper PA045 1,3 J. Stibinger and Soukup M. waste in osecna, Northern Bohemia. Paper PA046 1,3 M.M.Tawfik Probabilistic analysis of drainage water quality for sustainable reuse in agriculture Groundwater Modelling to Assess the Effect of Interceptor Drainage and Lining; Paper PA130 1,3 H.C. Jansen, M.N. Bhutta, I. Javed and W. Wolters Example of Model Application in the Fordwah Eastern Sadiqia Project, Pakistan Groundwater Modelling to Assess the Effect of Interceptor Drainage and Lining; Paper PA131 1,3 Jansen Hydrological and Modelling Concepts TOPIC 2: DRAINAGE: A TOOL FOR IWRM IN AGRICULTURE Subtopic 2.1 Drainage and water quality Subtopic 2.2 Management of Drainage Water Subtopic 2.3 Water Logging and Salinity Simply click on the Title to view a Paper. Type No. Topic Authors Title Discussion paper DP049 2,1 Evan Christen Salinity control. Is it efficient? Is it fair? Discussion Paper DP059 2,1 Roest C.W.J. Solute Transport Estimating BOD pollution rates along El-Salam canal using monitored water quality data Paper PA050 2,1 Ayman M.Mostafa El-Degwi ., Faten M.Ewida. and Sameh M. Gawad (1998-2001) Paper PA052 2,1 Hornbuckle J.W. , Christen E.W., et al Testing of a multi-level subsurface drainage system for improving drainage water quality Paper PA053 2,1 Kapoor A.S. A new approach to overcome the waterlogging and salinity problems in the Aral Sea Basin http://library.wur.nl/ebooks/drainage/drainage_cd/drainage_topics.html (3 of 6)26-4-2010 12:10:20 drainage_in.html Paper PA054 2,1 Kirejcheva I.V. and Glazunova I.V. Technical solutions to raise drainage efficiency at the irrigated lands Paasonen-Kivekäs M., Koivusalo H., Karvonen T., Vakkilainen P., Uursitalo Paper PA058 2,1 Contribution of subsurface drainage and surface runoff on nutrient losses in clay soils R., Alakukku L., Nuutinen V and Hintikka S. Brackish water treatment through sulfurous acid generator and alternate approaches Paper PA060 2,1 M. H. Zia and A. Ghafoor affects rice-wheat crops Paper PA126 2,1 De Wrachien D. and Feddes R. Drainage Development in a Changing Environment: Overview and Challenges Dissemination of Technologies for Rootzone Salinity Management and On-Farm Water Paper PA127 2,1 Azad, T.H. and Vos J. Management in the Lower Indus Basin of Pakistan Paper PA135 2,1 Kondo Masaaki Low dissolved oxygen environment in tidal river affected by inner bay and riverbed Paper PA061 2,2 A.S. Kapoor Bio drainage - Potential and Limitations Paper PA062 2,2 Ayars J.E., Soppe R.W. and Christen E.W. Managing salinity for sustainability of Irrigation in areas with shallow saline ground water Paper PA064 2,2 Bhutta M.N., Niazi M.F.K. and Nazir A. Environmental impact of disposal of drainage effluent to evaporation ponds Paper PA065 2,2 Chaudhry M.R., Iqbal M. and Subhani K.M. Use of Brackish Drainage Water Effluent for Crop Production Technological options for poor quality saline water management in agriculture: Scope & Paper PA066 2,2 Datta K.K. prospects Paddy rice cultivation in irrigated water managed saline sodic lands under reclamation, Paper PA071 2,2 Rashed A.A., Khalifa E. and Fahmy H.S. Egypt Paper PA072 2,2 Soppe R.W.O., Ayars J.E., Christen E.W. and Shouse P.J. Irrigation Management to Optimize Controlled Drainage in a Semi-Arid Area Reuse of Drainage Water for Rice and Wheat Growth During Reclamation of Saline-Sodic Paper PA073 2,2 Ghafoor A. and Boers Th. Soils in Pakistan under The National Drainage Program (NDP) Paper PA074 2,2 Seneviratne E.L.W. Tidal Areas of Sri Lanka Abdel-Mawgoud S.A., El-Shewikh M.B., Abdel-Aal A.I.N.
Load more

Recommended publications
  • 6Th Biennial Stormwater Research and Watershed Management Conference
    PROCEEDINGS 6th Biennial Stormwater Research and Watershed Management Conference September 14–17, 1999 • Tampa, Florida PROCEEDINGS OF THE SIXTH BIENNIAL STORMWATER RESEARCH AND WATERSHED MANAGEMENT CONFERENCE SEPTEMBER 14-17, 1999 FOUR POINTS SHERATON HOTEL TAMPA EAST TAMPA, FLORIDA Sponsored by the: Southwest Florida Water Management District Published by the: Southwest Florida Water Management District 2379 Broad Street Brooksville, Florida, 34609-6899 (352)796-7211 The Southwest Florida Water Management District (District) does not discriminate upon the basis of any individual’s disability status. This non-discrimination policy involves every aspect of the District’s functions, including one’s access to, participation, employment, or treatment in its programs or activities. Anyone requiring reasonable accommodation as provided for in the Americans With Disabilities Act should contact Gwen Brown, Resource Management Department, at (352) 796-7211 or 1-(800) 423-1476 (Florida), extension 4226; TDD ONLY 1-(800) 231-6103 (Florida); FAX (352) 754-6885/SUNCOM 663-6885. i Sixth Biennial Stormwater Research & Watershed Management Conference September 14-17, 1999 FOREWORD This conference is the sixth in a continuing series of symposia sponsored by the Southwest Florida Water Management District to disseminate the findings of current stormwater research, as well as the latest developments in watershed management. The conference was designed to provide a forum from which a wide range of stormwater treatment and watershed management ideas and issues could be discussed and debated, and where research results could receive initial peer review. The ultimate goal of the conference is to present the engineers, scientists, and regulators working in the field of stormwater and watershed management with the most current ideas and data available so that more efficient and cost-effective best management practices can be developed and implemented.
    [Show full text]
  • Conjunctive Use and Management of Groundwater and Surface Water
    Thematic Paper 2 Conjunctive use and management of groundwater and surface water A Global Framework for Action Groundwater Governance - A Global Framework for Action Groundwater Governance - A Global Framework for Action (2011-2014) is a joint project supported by the Global Environment Facility (GEF) and implemented by the Food and Agriculture Organisation of the United Nations (FAO), jointly with UNESCO's International Hydrological Programme (UNESCO-IHP), the International Association of Hydrologists (IAH) and the World Bank. The project is designed to raise awareness of the importance of groundwater resources for many regions of the world, and identify and promote best practices in groundwater governance as a way to achieve the sustainable management of groundwater resources. The first phase of the project consists of a review of the global situation of groundwater governance and aims to develop of a Global Groundwater Diagnostic that integrates regional and country experiences with prospects for the future. This first phase builds on a series of case studies, thematic papers and five regional consultations. Twelve thematic papers have thus been prepared to synthesize the current knowledge and experience concerning key economic, policy, institutional, environmental and technical aspects of groundwater management, and address emerging issues and innovative approaches. The 12 thematic papers are listed below and are available on the project website along with a Synthesis Report on Groundwater Governance that compiles the results of the case studies and the thematic papers. The second phase of the project will develop the main project outcome, a Global Framework for Action consisting of a set of policy and institutional guidelines, recommendations and best practices designed to improve groundwater management at country/local level, and groundwater governance at local, national and transboundary levels.
    [Show full text]
  • Research Priorities for Agricultural Drainage in Developing Countries
    Research priorities for agricultural drainage in developing countries C L Abbott P B Leeds-Harrison TDR Project R6879 ReportOD/TN92 February 1998 abcd Address and Registered Office: HR Wallingford Ltd. Howbery Park, Wallingford, OXON OX10 8BA Tel: +44 (0) 1491 835381 Fax: +44 (0) 1491 832233 Registered in England No. 2562099. HR Wallingford is a wholly owned subsidiary of HR Wallingford Group Ltd. ABCD ii OD/2490 22/05/00 ABCD iv OD/TN92 22/05/00 6XPPDU\ Research priorities for agricultural drainage in developing countries C L Abbott P B Leeds-Harrison TDR Project R6879 Report OD/TN92 February 1998 Worldwide production from irrigated agriculture needs to rise by 3% per year until well into the next millennium to keep pace with rising populations (World Bank, 1993a). However, 20-30 million ha of irrigated land are now seriously affected by problems of waterlogging and salinisation caused by poor water management and inadequate drainage. Smedema and Ochs (1997) estimate that the affected area is growing by about 5% each year. The World Bank (WB, 1993b) identified inadequate or inappropriate drainage as the most severe long-term problem facing agricultural production. Without effective drainage, the benefits of irrigation are forfeit. Affected lands are characterised by one or more of the following constraints: reduced cultivated area, reduced yield, curtailed cropping seasons, limited choice of crops. Many of the problems constraining drainage are social, economic or institutional in nature. Nonetheless, there are substantial technical issues directly affecting irrigation scheme performance and output, for which practical solutions remain to be developed. Some technologies have been successfully transferred from the developed to the developing world, but there is an urgent need to produce appropriate solutions, particularly for humid areas.
    [Show full text]
  • 16.3 Numerical Groundwater Models
    say the top 10 m, because the groundwater salinity below this depth does not change over short periods. It does change, however, when deep tubewells are installed and operated. When there is deep pumping, therefore, the assessment must include data from a much greater depth to take into account the effects of partial penetration by the tubewells. To estimate the changes in the salt concentration of the groundwater reservoir, it is necessary to make a water and salt balance of the unsaturated zone. It is through this zone that water and salt move to the groundwater. In areas with shallow watertables, water and salt move to the surface through capillary rise, where the water evaporates and the salt concentrates in the upper soil layers. If we have a salt balance of the unsaturated zone, we can estimate the net quantity of salt that enters the groundwater reservoir through the percolation of precipitation and irrigation water. The salt balance of the groundwater reservoir can then be assessed with this quantity (Brown et al. 1977). For salt balance studies, we can use the same data we used for the total water balance, the water balance of the unsaturated zone, and the water balance of the groundwater reservoir. These studies are usually made in experimental plots or key plots, in combination with studies of soil water and groundwater movements. A network of nested piezometers is necessary to measure the water levels and to take water samples for tests of the salt concentration. It is common to measure the salt concentrations in the unsaturated zone before and after the soil is leached and before and after the growing season (Chapter 15).
    [Show full text]
  • Groundwater Pumping to Prevent Salinity at Bodallin
    Government of Western Australia Department of Water Groundwater pumping to prevent salinity at Bodallin Department of Water 168 St Georges Terrace, Perth, Western Australia PO Box K822 Perth Western Australia 6842 Phone: (08) 6364 7600 Fax: (08) 6364 7601 www.water.wa.gov.au ter needs all our wa g after Lookin Salinity and land use impacts series Report no. SLUI 44 October 2012 Groundwater pumping to prevent salinity at Bodallin by S Tetlow & N Cox Department of Water Salinity and land use impacts series Report no. SLUI 44 October 2012 Department of Water 168 St Georges Terrace Perth Western Australia 6000 Telephone +61 8 6364 7600 Facsimile +61 8 6364 7601 National Relay Service 13 36 77 www.water.wa.gov.au © Government of Western Australia 2012 October 2012 This work is copyright. You may download, display, print and reproduce this material in unaltered form only (retaining this notice) for your personal, non-commercial use or use within your organisation. Apart from any use as permitted under the Copyright Act 1968, all other rights are reserved. Requests and inquiries concerning reproduction and rights should be addressed to the Department of Water. ISSN 1447-7394 (print) 1449-5252 (online) ISBN 978-1-921637-16-2 (print) 978-1-921637-17-9 (online) Recommended reference Tetlow, S & Cox, N 2012, Groundwater pumping to prevent salinity at Bodallin, Salinity and land use impacts series, Report no. SLUI 44, Department of Water, Perth. Acknowledgements The Department of Water thanks the following for their contributions to this publication: Merrilyn and Tohl Temby for access to their property and their contributions to the project costs; Ken Hodgekis, farm manager for day to day running of some of the project equipment; the Bodallin Catchment Group for groundwater information and assistance with monitoring of the project; Flockhart and Wheatbelt Water Drilling for project borehole drilling; Department of Water Swan Goldfields hydrographic and monitoring group for project monitoring; Shawan Dogramaci and Tom Brooks.
    [Show full text]
  • A Comparison Between Horizontal and Vertical Drainage Systems (Include Pipe Drainage, Open Ditch Drainage, and Pumped Wells) in Anisotropic Soils
    IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) ISSN: 2278-1684 Volume 4, Issue 1 (Nov. - Dec. 2012), PP 07-12 www.iosrjournals.org A Comparison between Horizontal and Vertical Drainage Systems (Include Pipe Drainage, Open Ditch Drainage, and Pumped Wells) in Anisotropic Soils Mohammad Valipour Department of Irrigation and Drainage Engineering, College of Abureyhan, University of Tehran, Pakdasht, ABSTRACT : Selecting a proper drainage system always has been discussed in agricultural or other fields. In anisotropic soils, this problem is more sensitive for experts. In this study, a comparison has been done between horizontal and vertical drainage in anisotropic soils. For this purpose, using EnDrainWin and WellDrain softwares drain spacing and well spacing, respectively, determined. The results showed that in the same situation, horizontal drainage systems due to the higher spacings between drains (reducing number of drainage and thus reducing the cost) were better than vertical drainage systems. However, vertical drainage systems due to the lower changes in well spacing in different anisotropic soils were suitable for conditions that soil hydraulic conductivity was likely to change. Keywords: Drain discharge, subsurface drainage systems design, watertable control I. INTRODUCTION The design of horizontal and vertical drainage in terms layout, depth and spacing of the drains is often done using subsurface drainage equations with parameters like drain depth, depth of the watertable, soil depth, hydraulic conductivity of the soil and drain discharge. The design of horizontal and vertical drainage systems has been aimed at many researches, which some of them will be described in the following. Geng et al. (2012) presented analytical solutions for a single vertical drain with vacuum and time- dependents preloading in membrane and membraneless systems.
    [Show full text]
  • Some Important Elements of Soil-Water Relationship in Managing Oil Palms Planted on Acid Sulfate Soils
    International Journal of Hydrology Research Article Open Access Some important elements of soil-water relationship in managing oil palms planted on acid sulfate soils Introduction Volume 4 Issue 6 - 2020 Oil palms (Elaeis guineensis) are generally able to grow UT Pupathy,1 T Sabrina,2 S Paramananthan,3 economically and feasibly on various soil types, mostly in tropical Rosazlin Abdullah4 countries. However, oil palms planted on acid sulfate soils were 1Sumber Tani Agung (STA) Resources, Jn Dipronegoro 51, producing lesser Fresh Fruit Bunches (FFB) as compared to those on Medan, 20152, Sumatra, Indonesia 2Department of Agriculture, Faculty of Agriculture, Universitas non-acid sulfate soils. The poor performance of oil palms planted on Sumatera Utara, Medan, Indonesia acid sulfate was mainly attributed to the presence of excess sulfates, 3Param Agricultural Soil Surveys (M) Sdn Bhd (PASS), Petaling which limits the FFB yields and vegetative growth.1 Generally, acid Jaya, Malaysia sulfate soils have significant amounts of free and absorbed sulfate. 4Institute of Biological Sciences, Faculty of Science, Universiti Jarosite generally occurs as pale yellow mottles along old root channels Malaya, Kuala Lumpur, Malaysia and on ped faces in acid sulfate soils. pH in these horizon is less than Correspondence: UT Pupathy, Department of Agriculture, 4.0.2,3 These soils often are also high in Aluminium (Al), Al saturation Faculty of Agriculture, Universitas Sumatera Utara, Medan, and often with phosphorus (P) fixation capacity. These acid sulfate Indonesia, Email soils are known for having poor values for organic matter, bases, Received: December 03, 2020 | Published: December 22, cation exchange capacity, water retention, water holding capacity and 2020 microbial activity, which contributes towards their low soil fertility and hence limitations in soil productivity.
    [Show full text]
  • Soil Salinity Monitoring Using Remote Sensing 2
    WORKSHOP REPORT Cooperative Research CEntre for Sustainable Rice Production Salinity Research Workshop Report Proceedings compiled by 1Ary van der Lely and 2Geoff Beecher 1,2Cooperative Research Centre for Sustainable Rice Production C/-Yanco Agricultural Institute PMB Yanco NSW 2703 Email: [email protected] http://www.ricecrc.org 1Department of land and Water Conservation PO Box 156 Leeton NSW 2705 Email: [email protected] http://www.dlwc.nsw.gov.au 2NSW Agriculture Yanco Agricultural Institute PMB Yanco NSW 2703 file:///C|/Inetpub/wwwroot/rice_CRC/research/prog...og1_reports/salinity_report/P1000WR02-99(Pub).htm (1 of 44) [6/12/2001 10:28:19 AM] WORKSHOP REPORT Email: [email protected] http://www.agric.nsw.gov.au Table of contents Introduction..................................................................................................................... 2 Topic 1: Site Specific Research........................................................................................ 3 Topic 2: Spatial Distribution Issues................................................................................... 3 Topic 3: Off-Site Effects................................................................................................... 5 Topic 4: Effect of Management and Practices.................................................................... 6 Topic 5: Remedial Measures............................................................................................ 7 Topic 6: Economics and Optimisation Issues....................................................................
    [Show full text]
  • Improving Water and Land Management for Efficient
    The 19th ICID Congress, Beijing, Sept. 2005 Q52. IMPROVING WATER AND LAND MANAGEMENT FOR INCREASING EFFICIENCY IN IRRIGATED AGRICULTURE IMPROVING WATER AND LAND MANAGEMENT FOR EFFICIENT WATER USE Q52.1: On-farm water and soil management; IN IRRIGATED AGRICULTURE Q52.2: Performance evaluation and integrated management of irrigation and drainage systems; Luis S. Pereira Q52.3: Conjunctive use of water to optimize food production; Vice-president Hon., ICID Q52.4: Policy options for water saving in irrigation; President, CIGR Q52.5: Management transfer and participatory irrigation and drainage management; Technical University of Lisbon Q52.6: Application of information technology in irrigation and drainage management. For millennia, civilisations developed in water scarce environments. The respective cultural skills are an essential heritage of those nations and peoples, and the humanity as well. A water economic culture is now following a technical one, imposed when the large irrigation schemes were built. Both are generally imported from different cultural and instituttional environments. Management faces therefore difficult challenges due to the fact that irrigators have a perception of problems, practices and objectives different from the non-farmer managers. However, progress in XX century questioned the traditional know-how, which has been often replaced by modern technologies and management Tozeur imported from different environments and cultures. Pressures about water use in irrigation are coming from a ever A turn in viewing traditional
    [Show full text]
  • Drainage by Wells on Web Page
    1 Drainage by wells On web page https://www.waterlog.info/lectures.htm Well drainage means subsurface drainage of agricultural lands by wells. Agricultural land is drained by pumped wells (vertical drainage) to improve the soils by controlling water table levels and soil salinity. It is an alternative for horizontal drainage by pipes or ditches. With a well drainage system one can lower the level of the water table, evacuate salts from the soil so that the growing conditions of the plants are improved. Contents • 1. Design • 2. Aquifer not uniform • 3. References 1. Design Although one well may be sufficient to solve groundwater and soil salinity problems in a few hectares, one usually needs a number of wells, because the problems may be widely spread. The wells may be arranged in a triangular, square or rectangular pattern. The design of the well field concerns depth, capacity, discharge, and spacing of the wells.[1] 1. The discharge capacity is found from a water balance. 2. The depth is selected in accordance to aquifer properties. The well filter must be placed in a permeable soil layer. 3. The spacing between the wells can be calculated with a well spacing equation using discharge, aquifer properties, well depth and optimal depth of the water table. The determination of the optimum depth of the water table is the realm of drainage research . The basic, steady state, equation for flow to fully penetrating wells (i.e. wells reaching the impermeable base) in a regularly spaced well field in a uniform unconfined (preactic) aquifer with an hydraulic conductivity that is isotropic is: Q = 2π K (Db – Dm) (Dw – Dm) / ln (Ri / Rw) where Q = safe well discharge - i.e.
    [Show full text]
  • A Theoretical Study of Subsurface Drainage Model Simulation of Drainage Flow and Leaching in Salt Affected Irrigated Fields
    A Theoretical Study of Subsurface Drainage Model Simulation of Drainage Flow and Leaching in Salt Affected Irrigated Fields 1 2 E. A. Ampofo * and T. W. Tanton 1 Department of Soil Science, University of Cape Coast, Cape Coast, Ghana 2 School of Civil Engineering and the Environment, University of Southampton, SO17 1BJ, UK. *Corresponding author; Email: edwardakwasi @yahoo.com Abstract A three-dimensional variable-density groundwater flow model, the SEAWAT model, was used to assess the influence of subsurface drain spacing, evapotranspiration and irrigation water quality on salt concentration at the base of the root zone, leaching and drainage in salt affected irrigated land. The study was carried out on a conceptual uniform homogenous irrigated field of shallow watertable depth of 0.5 m and aquifer salt concentration of 7200 mg/l with an impermeable layer at 10 m depth and impermeable field boundaries. The model was run for 10 years with an irrigation rate (applied recharge) of 8 mm/d and salt concentration of 1,500 mg/l, over a range of drain spacings. During the 10-year drainage period, the simulated concentrations at the base of the root zone and the discharge rates were the same at all the spacing when evapotranspiration was not included. However, upon inclusion of evapotranspiration, the simulated concentration at the base of the root zone ranged from about 5,200 to about 6200 mg/l, the discharge rate ranged from 2.3 to 1.9 mm/d. When the applied recharge concentration was changed to 1,000 mg/l and 700 mg/l, but with all the other parameters maintained, the simulated concentration at the base of the root zone ranged from 3,700 to 4,400 mg/l, and from 2,800 to 3200 mg/l for the different spacing, respectively.
    [Show full text]
  • Modeling Performance of a Tile Drainage System Incorporating Mole Drainage
    An ASABE Meeting Presentation DOI: 10.13031/ids.20162487018 Paper Number: 162487018 15 Modeling performance of a tile drainage system incorporating mole drainage Tuohy, P.1, O’ Loughlin, J.1, Fenton, O.2 1Animal and Grassland Research and Innovation Centre, Teagasc, Moorepark, Fermoy, Co. Cork, Ireland, 2 Environment Research Centre, Teagasc, Johnstown Castle, Wexford, Co. Wexford, Ireland. Written for presentation at the 10th International Drainage Symposium Partners University of Minnesota Water Resources Center American Society of Agricultural and Biological Engineers Minneapolis, Minnesota September 7 – 9, 2016 ABSTRACT. In fine textured low permeability soil profiles, mole drainage is used as a supplementary measure to subsurface tile drains. However, performance is known to vary temporally and spatially due to variations in soil properties, installation conditions, mole channel integrity and weather patterns. A model study is presented whereby a finite element software package, SEEP/W, has been calibrated and validated for a field site having (System 1) subsurface tile drains with gravel aggregate (0.9 m depth, 15 m spacing) and intersecting mole drains (0.6 m depth, 1.4 m spacing) on the west coast of Ireland. The calibrated model showed close agreement between modeled and observed subsurface drainage (index of agreement = 0.89) and predicted cumulative subsurface drainage volumes 12% higher than observed in the validation period. The model was then used to evaluate the impact of a range of alternative drainage designs namely; System 2: tile drains only; System 3: Similar to System 1 with ks of the mole drained soil layer decreased to mimic a reduction in mole drain integrity/effectiveness and System 4: Similar to System 1 with ks of the mole drained soil layer increased to mimic improved soil disturbance and fissuring during installation.
    [Show full text]