DOCSLIB.ORG

Morphometric Analysis of Sub- Watersheds in Oguta and Environs, Southeastern Nigeria Using GIS and Remote Sensing Data

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Morphometric Analysis of Sub- Watersheds in Oguta and Environs, Southeastern Nigeria Using GIS and Remote Sensing Data Journal of Geosciences and Geomatics, 2016, Vol. 4, No. 2, 21-28 Available online at http://pubs.sciepub.com/jgg/4/2/1 © Science and Education Publishing DOI:10.12691/jgg-4-2-1 Morphometric Analysis of Sub- watersheds in Oguta and Environs, Southeastern Nigeria Using GIS and Remote Sensing Data Udoka Ubong Paulinus1,*, Nwankwor Godwin Ifedilichukwu1, Ahiarakwem Cosmas Ahamefula1, Opara Alex Iheanyichukwu1, Emberga Terhemba Theophilus2, Inyang Godwin Edet1 1Department of Geosciences, Federal University of Technology, Owerri, Nigeria 2Department of Physics/Industrial Physics, Federal Polytechnic, Nekede, Owerri, Nigeria *Corresponding author: [email protected] Abstract Morphometric analysis of the sub- watersheds in Oguta area, Southeastern Nigeria using GIS processed Remote Sensing data was carried out with the objectives of evaluating their morphometric characteristics and other landuse/landcover dynamics. The present study involved the measurement of the linear, aerial and relief aspects of the dimensions of the sub-watersheds. Analysis of the landuse classification revealed that Njaba drainage basin is made up of 37.32% farmland and grassland, 27.51% forest, 20.06% bare land, and 5.28% water, while the Orashi drainage basin comprises of 30.23% farmland, 10.35% urban settlement, 20.14% forest land, 15.13% bare land and 24.14% water body. It was also revealed from the study that Njaba drainage basin has a basin length of 21.48km2 while that of Orashi drainage basin was estimated to be 29.59km2. Similarly, whereas the former has an area of 21.48 km2 the latter has an estimated area of about 29.59km2. Further morphometric analysis revealed that the bifurcation ratio of Njaba and Orashi drainage basins were estimated at 1.80 and 3.92 respectively, while their drainage densities were put at about 0.54 and 0.51 respectively. Finally, the basin relief ratios of the basins were estimated at 0.0038 and 0.00367 respectively while their form factor was given as 0.31 and 0.189 respectively. The form factor values estimated from this study revealed that the Njaba drainage basin is circular while Orashi drainage basin revealed an elongated dimension. These morphometric characteristics are key indices that are invaluable in assessing the geo-hydrological behavior of the drainage basins and their vulnerability to flooding. Keywords: drainage basin, Oguta, basin morphometry, watershed, flood management, GIS Cite This Article: Udoka Ubong Paulinus, Nwankwor Godwin Ifedilichukwu, Ahiarakwem Cosmas Ahamefula, Opara Alex Iheanyichukwu, Emberga Terhemba Theophilus, and Inyang Godwin Edet “Morphometric Analysis of Sub- watersheds in Oguta and Environs, Southeastern Nigeria Using GIS and Remote Sensing Data.” Journal of Geosciences and Geomatics, vol. 4, no. 2 (2016): 21-28. doi: 10.12691/jgg-4-2-1. segments, bifurcation ratio, drainage density, and frequency. It is an attempt to combine the geomorphologic 1. Introduction and hydrological attributes of the drainage basins. Integration of remote sensing and geographic Watershed is an area of land drained by rivers and its information system (GIS) technologies have been utilized tributaries. Its boundary is marked by ridges of high land productively worldwide to detect and monitor changes in beyond which any precipitation will drain into adjacent the landscape and the consequential environmental basins. This boundary is called a drainage divide. impacts like flooding, gully erosion, etc. Previous studies Drainage basin or watershed can also be described as an have used remote sensory and GIS data to examine land open system and is considered a fundamental element in use changes in recent times with the objective of the analysis of a part of the hydrological cycle. It is a identifying patterns of urban development that could be system where inputs from precipitation (rain and snow) associated with specific environmental factors [2]. There undergo the process of infiltration, percolation, through are numerous examples of traditional and expert based flow and overland flow (surface run-off) thereby image classification systems for detection, monitoring and proceeding as output in the form of evapo- transpiration mapping the land use and land cover characteristics (the loss of water directly from the ground, water, surface worldwide using remote sensing data. Remote Sensing and vegetation) [1]. Drainage basins be assessed and and GIS techniques have also proven to be efficient tools characterized by measuring their dimensions with respect in the delineation, characterization and morphometric to their linear, aerial, and relief aspect. This research is an analysis of drainage basins worldwide. Drainage basin attempt to understand the drainage basins by evaluating analysis is also very important in any hydrological their morphometric parameters which includes their basin investigation like assessment of groundwater potential and shape, length, area, stream order, number of stream management. Various environmental hazards associated 22 Journal of Geosciences and Geomatics with hydrologic phenomena are most often correlatable so far no exhaustive work on the morphometric with the physiographic characteristics of drainage basins investigation of the region has been carried out. This study such as size, shape, slope of drainage area, drainage gives an insight into the different geo-hydrological density, and of course length of the tributaries [3]. Remote characteristics of the drainage basin which in turn help in sensing data can be used in conjunction with conventional the management of the water and other natural resources data for delineation of ridgelines, characterization, priority of the area. evaluation, problem identification, assessment of potentials and management needs, identification of erosion prone 2. Location, Physiography, Hydrology areas, evolving water conservation strategies, selection of sites for check dams and reservoirs, Etc. [4]. and Geology of the Study Area Morphometry is the measurement and mathematical The study area of interest in this research is Oguta analysis of the configuration of the earth's surface, shape Local Government Area with a consideration of sub- and dimension of its landforms [5]. Morphometric studies watershed within Oguta Lake/Upper reaches of the in the field of hydrology were first initiated by Horton [6]. Otamiri, and Upper reaches of Otamiri/ Njaba areas. It has The morphometric analysis of the drainage basin and an estimated area of 484.58 km2 and a population of channel network play a vital role for understanding the 142,340 persons. It lies within a perimeter of 36.62692km geo-hydrological behavior of drainage basin and expresses and is located within latitudes 5040129.918N- the prevailing climate, geology, geomorphology, structural, 5041109.200N and longitudes 6049132.06E to 6050102.05E. etc. antecedents of the catchment. The relationship The study area belongs to the coastal sedimentary between various drainage parameters and the aforesaid lowlands of the southern Nigeria hydrological province as factors are well- recognized by many workers [7,8,9,10]. shown in Figure 1. The climate is divided into two main The drainage basin analysis is important in any hydrological seasons: wet and dry season. Most of the area has a mean investigation like assessment of groundwater potential, annual rainfall of about 2152mm [13]. This occurs during groundwater management, pedology and environmental the wet season, April to October, and associated with assessment. Hydrologists and Geomorphologists have moisture laden maritime southwest trade winds from the recognized that certain relations are most important Atlantic Ocean. The temperature in the study area ranges between runoff characteristics, and geographic and between 23° to 26°C.The terrain of the study area is geomorphic characteristics of drainage basin systems. characterized by two types of land forms; gently Various important hydrologic phenomena can be undulating ridges and nearly flat topography. The ridges correlated with the physiographic characteristics of trend in the north-south direction and have an average drainage basins such as size, shape, slope of drainage area, elevation of about 122 m [14]. The southern part of the drainage density, size and length of the contributories. study area consists of gently undulating ridges of coastal Geology, relief and climate are the primary determinants plain sands of the Benin Formation mainly around of running water ecosystems functioning at the basin scale. Ogbaku, Awomama ,Mgbidi, Izombe and Nkwesi areas. Detailed morphometric analysis of a basin is a great help Other areas around Orsu-Obodo towards Oguta town and in understanding the influence of drainage morphometric its immediate environs, have alluvium deltaic plain network on landforms and their characteristics. The deposits (Recent deposits) located mainly along the banks quantitative analysis of morphometric parameters is found of Orashi and Njaba Rivers. to be of immense utility in river basin evaluation, The geology and geomorphology of the Niger delta watershed prioritization for soil and water conservation have been described in details by various authors and natural resources management. The influence of [15,16,17]. The formation of the present day Niger delta drainage morphometric system is very significant in started during Early Paleocene and it resulted mainly from understanding the landform processes, soil physical the buildup of fine grained sediments eroded and transported properties
Load more

Recommended publications
  • Nigeria's Constitution of 1999
    PDF generated: 26 Aug 2021, 16:42 constituteproject.org Nigeria's Constitution of 1999 This complete constitution has been generated from excerpts of texts from the repository of the Comparative Constitutions Project, and distributed on constituteproject.org. constituteproject.org PDF generated: 26 Aug 2021, 16:42 Table of contents Preamble . 5 Chapter I: General Provisions . 5 Part I: Federal Republic of Nigeria . 5 Part II: Powers of the Federal Republic of Nigeria . 6 Chapter II: Fundamental Objectives and Directive Principles of State Policy . 13 Chapter III: Citizenship . 17 Chapter IV: Fundamental Rights . 20 Chapter V: The Legislature . 28 Part I: National Assembly . 28 A. Composition and Staff of National Assembly . 28 B. Procedure for Summoning and Dissolution of National Assembly . 29 C. Qualifications for Membership of National Assembly and Right of Attendance . 32 D. Elections to National Assembly . 35 E. Powers and Control over Public Funds . 36 Part II: House of Assembly of a State . 40 A. Composition and Staff of House of Assembly . 40 B. Procedure for Summoning and Dissolution of House of Assembly . 41 C. Qualification for Membership of House of Assembly and Right of Attendance . 43 D. Elections to a House of Assembly . 45 E. Powers and Control over Public Funds . 47 Chapter VI: The Executive . 50 Part I: Federal Executive . 50 A. The President of the Federation . 50 B. Establishment of Certain Federal Executive Bodies . 58 C. Public Revenue . 61 D. The Public Service of the Federation . 63 Part II: State Executive . 65 A. Governor of a State . 65 B. Establishment of Certain State Executive Bodies .
    [Show full text]
  • River Basins of Imo State for Sustainable Water Resources
    nvironm E en l & ta i l iv E C n g Okoro et al., J Civil Environ Eng 2014, 4:1 f o i n l Journal of Civil & Environmental e a e n r r i DOI: 10.4172/2165-784X.1000134 n u g o J ISSN: 2165-784X Engineering Review Article Open Access River Basins of Imo State for Sustainable Water Resources Management BC Okoro1*, RA Uzoukwu2 and NM Chimezie2 1Department of Civil Engineering, Federal University of Technology, Owerri, Imo State, Nigeria 2Department of Civil Engineering Technology, Federal Polytechnic Nekede, Owerri, Imo State, Nigeria Abstract The river basins of Imo state, Nigeria are presented as a natural vital resource for sustainable water resources management in the area. The study identified most of all the known rivers in Imo State and provided information like relief, topography and other geographical features of the major rivers which are crucial to aid water management for a sustainable water infrastructure in the communities of the watershed. The rivers and lakes are classified into five watersheds (river basins) such as Okigwe watershed, Mbaise / Mbano watershed, Orlu watershed, Oguta watershed and finally, Owerri watershed. The knowledge of the river basins in Imo State will help analyze the problems involved in water resources allocation and to provide guidance for the planning and management of water resources in the state for sustainable development. Keywords: Rivers; Basins/Watersheds; Water allocation; • What minimum reservoir capacity will be sufficient to assure Sustainability adequate water for irrigation or municipal water supply, during droughts? Introduction • How much quantity of water will become available at a reservoir An understanding of the hydrology of a region or state is paramount site, and when will it become available? In other words, what in the development of such region (state).
    [Show full text]
  • Characteristics of Leachate at Ihiagwa Dumpsite, Imo State Nigeria and Their Implications for Surface Water Pollution
    International Journal of Advanced Academic Research | ISSN: 2488-9849 Vol. 7, Issue 3 (March, 2021) | www.ijaar.org Journal DOI: www.doi.org/10.46654/ij.24889849 Article DOI: www.doi.org/10.46654/ij.24889849.e7223 CHARACTERISTICS OF LEACHATE AT IHIAGWA DUMPSITE, IMO STATE NIGERIA AND THEIR IMPLICATIONS FOR SURFACE WATER POLLUTION Nelson-Kalu, C.T1; Amangabara, G.T1; Owuama, C.O.1, Nzeh, C.N and Uyo, C.N Department of Environmental Management, Federal University of Technology, Owerri. [email protected], [email protected] ABSTRACT Open dumpsite is the most common way to eliminate solid urban wastes in this part of the world. An important problem associated to landfills and open dumpsite is the production of leachates. The leachates from these dumpsites have many toxic substances, which may adversely affect the environmental health. Thus in order to have a better management of characteristics of Ihiagwa-Nekede waste dump leachates, representative leachate samples were collected and analyzed for Physico-chemical properties and levels of heavy metals in them. Results indicate pH7.38, temperature 28.30 ℃ - 28.40℃, total dissolved solid 124.01mg/l-125.45mg/l, magnesium hardness 4.40mg/l-7.32mg/l, sulphate 3.60mg/l- 3.70mg/l, and nitrate 27.00mg/l-27.60mg/l. Other parameters indicated as follows Conductivity1910휇푠/푐푚-1930.00 휇푠/푐푚, total chloride 891.72mg/l-891.74mg/l, carbonate 1708.00mg/l-1904.00mg/l, Ammonia 9.39mg/l-9.40mg/l, calcium hardness 373.17mg/l- 375.61mg/l, total solid 2423.00mg/l-2454.00mg/l, phosphate 13.52mg/l-13.54mg/l.
    [Show full text]
  • National Inland Waterways Authority
    Part I Establishment of the National Inland Waterways Authority 1. Establishment of the National 2. Objectives of the Authority 3. Establishment and composition Inland Waterways Authority of the Board of the Authority 4. Tenure of office of members of 5. Remuneration. 6. Termination of Board the Board membership 7. Frequency of Board attendance Part II Functions and powers 8. General functions of the 9. Other functions and powers of Authority the Authority Part III Declaration of Navigable Waterways 10. Declaration of navigable 11. Area under control of the 12. Right to land use for navigable waterways Authority purposes including right of way 13. Right to land within right of way. Part IV Staff of the Authority 14. Appointment, etc. of the 15. Appointment of secretary 16. Conditions of service of staff. Managing Director and other staff of the Authority 17. Application of Pensions Act. Part V Financial provisions 18. Fund of the Authority. 19. Surplus funds. 20. Borrowing power. 21. Annual estimates, accounts and 22. Annual reports. audit. Part VI Miscellaneous 23. Offences and penalties 24. Power to own land. 25. Power to accept gifts. 26. Time limitation of suits against 27. Dissolution of Inland 28. Power to make regulations the Authority. Waterways Department and transfer of assets and liability 29. Interpretation. 30. Short title Schedules First Schedule Supplementary provisions relating to the Authority Second Schedule Federal navigable waterways Third Schedule River ports whose approaches are exempted from the control of the Authority Fourth Schedule Assets of the Department vested in the Authority An Act to establish the National Inland Waterways Authority with responsibility, among other things, to improve and develop inland waterways for Navigation.
    [Show full text]
  • South – East Zone
    South – East Zone Abia State Contact Number/Enquires ‐08036725051 S/N City / Town Street Address 1 Aba Abia State Polytechnic, Aba 2 Aba Aba Main Park (Asa Road) 3 Aba Ogbor Hill (Opobo Junction) 4 Aba Iheoji Market (Ohanku, Aba) 5 Aba Osisioma By Express 6 Aba Eziama Aba North (Pz) 7 Aba 222 Clifford Road (Agm Church) 8 Aba Aba Town Hall, L.G Hqr, Aba South 9 Aba A.G.C. 39 Osusu Rd, Aba North 10 Aba A.G.C. 22 Ikonne Street, Aba North 11 Aba A.G.C. 252 Faulks Road, Aba North 12 Aba A.G.C. 84 Ohanku Road, Aba South 13 Aba A.G.C. Ukaegbu Ogbor Hill, Aba North 14 Aba A.G.C. Ozuitem, Aba South 15 Aba A.G.C. 55 Ogbonna Rd, Aba North 16 Aba Sda, 1 School Rd, Aba South 17 Aba Our Lady Of Rose Cath. Ngwa Rd, Aba South 18 Aba Abia State University Teaching Hospital – Hospital Road, Aba 19 Aba Ama Ogbonna/Osusu, Aba 20 Aba Ahia Ohuru, Aba 21 Aba Abayi Ariaria, Aba 22 Aba Seven ‐ Up Ogbor Hill, Aba 23 Aba Asa Nnetu – Spair Parts Market, Aba 24 Aba Zonal Board/Afor Une, Aba 25 Aba Obohia ‐ Our Lady Of Fatima, Aba 26 Aba Mr Bigs – Factory Road, Aba 27 Aba Ph Rd ‐ Udenwanyi, Aba 28 Aba Tony‐ Mas Becoz Fast Food‐ Umuode By Express, Aba 29 Aba Okpu Umuobo – By Aba Owerri Road, Aba 30 Aba Obikabia Junction – Ogbor Hill, Aba 31 Aba Ihemelandu – Evina, Aba 32 Aba East Street By Azikiwe – New Era Hospital, Aba 33 Aba Owerri – Aba Primary School, Aba 34 Aba Nigeria Breweries – Industrial Road, Aba 35 Aba Orie Ohabiam Market, Aba 36 Aba Jubilee By Asa Road, Aba 37 Aba St.
    [Show full text]
  • Constituents Budget of Njaba River at Okwudor
    IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) e-ISSN: 2321–0990, p-ISSN: 2321–0982.Volume 8, Issue 1 Ser. III (Jan – Feb 2020), PP 01-10 www.iosrjournals.org Constituents Budget of Njaba River at Okwudor Abiahu, C. M. G.,1 Ahiarakwem, C. A. 1Oli, I.C.,1Osi-Okeke, I.1and Meribe, P.N.1 Department of Geology, Federal University of Technology, Owerri, P.M.B 1526 Abstract The constituent budget of Njaba River at Okwudor was undertaken to understand the loading rate of constituents over a period of time (2011-2019). Water samples were obtained at equal distances of 2 km along the stretch of the River. The samples were obtained with the aid of sterilized 1.5 plastic bottle; the sample bottles were corked under water immediately after collection so as to prevent oxidation of the constituents. The water samples obtained from Okwudor was used to probe some physiochemical parameters and constituent budget of Njaba River over a period of eight years (2011 – 2019). The result indicates the pH of the River with values of 6.40 in 2011 and 6.44 in 2019. The TDS value for 2011 was 14.70 mg/l while for 2019 was 7.00 mg/l and the Total hardness of the water for 2011 was 11.80 mg/l and 2019 as 41.46 mg/l.The constituent budget 2+ 2+ + + 2- - - -3 indicates continuous loading of constituents (Ca ,Mg , Na , K ,SO 4,NO 3,Cl , and PO 4) into the Njabariver. - However, there was a decline in HCO 3.The constituent budgetindicates that Chlorine has the highest loading rate (2.97) while bicarbonate has the lowest loading rate (-0.63).
    [Show full text]
  • Projects Development Institute (Proda), Enugu (Federal Ministry of Science and Technology) Proda Road, P.M. B. 01609, Emene Indu
    PROJECTS DEVELOPMENT INSTITUTE (PRODA), ENUGU (FEDERAL MINISTRY OF SCIENCE AND TECHNOLOGY) PRODA ROAD, P.M. B. 01609, EMENE INDUSTRIAL LAYOUT, OFF ENUGU/ABAKALIKI EXPRESSWAY, ENUGU. INVITATION FOR TECHNICAL AND FINANCIAL TENDERS AND EXPRESSION OF INTEREST Projects Development Institute (Proda) Enugu, A Parastatal under the Federal ministry of Science and Technology is desirous of carrying out its capital projects under the 2017 Budget. In compliance with the Public Procurement Act 2007, the Institute invites interested and reputable contractors with relevant experience to Bid for the Procurement and Execution of the under listed projects: CATEGORY A (WORKS) Lot A (1): Production Of 6 Cylinder I.C. Engine Components and Engine Lot A (2): School Pencil Development Lot A (3): Lithium ion Battery Research and Development. Lot A (4): Installation, Training and Operations of CNC Machines Lot A (5): Automation of Cassava Starch Processing Flow Line Lot A (6): Procurement of Equipment for Electrical Power and Electronic Development Workshop Lot A (7): Development and Production of Smokeless Solid Fuels and Activated Carbons From Coal and Biomass Lot A (8): Commercial Production of Electrical Porcelain Insulators Lot A (9): Revaluation of Land Lot A (10): Rehabilitation of Offices/Building at PRODA Premises. Lot A (11): Refurbishing of PRODA Projects Vehicles (Utility Vehicles, Tankers, Tippers, Tractors. Etc.) Lot A (12): Fencing of Ceramic Production Department Workshop at PRODA Lot A (13): Rehabilitation of Water Treatment Plant Lot A (14):
    [Show full text]
  • Preliminary Interpretation of Gravity Mapping Over the Njaba Sub-Basin of Southeastern Nigeria: an Implication to Petroleum Potential
    Vol. 5(3), pp.75-87, March, 2013 Journal of Geology and Mining DOI: 10.5897/JGMR2013.0171 ISSN 2006 – 9766 © 2013 Academic Journals Research http://www.academicjournals.org/JGMR Full Length Research Paper Preliminary interpretation of gravity mapping over the Njaba sub-basin of southeastern Nigeria: An implication to petroleum potential Ezekiel J. C.*, Onu N. N., Akaolisa C. Z. and Opara A. I. Department of Geosciences, Federal University of Technology, P. M. B. 1526, Owerri, Imo State, Nigeria. Accepted 29 March, 2013 Gravity data were acquired along two profiles in some parts of the Njaba River sub-basin. Profile A-A’ and B-B’ run for about 30 and 12 km respectively with the end of the two profiles meeting at Oguta Lake. The Bouguer gravity anomaly along Profile A-A’ revealed initial positive gravity values to a wavelength of about 21 km and then followed by a sudden drop of the observed gravity showing a significant gravity minimum. Profile B-B’ showed an alternating gravity high and low which was followed by a sudden extremely low value in the observed gravity. Further investigation showed that the structure modeled is graben and horsts bounded by two normal faults. The high gravity observed is due to the lesser density contrasts between the sediments and the basement which had resulted from the up-warping of the crust. The area showing low gravity revealed thick sedimentary accumulation of recently deposited alluvium deposits deposited in the subsided area bounded by these two faults. The structural framework of the parts of the sub-basin studied suggested an environment favorable for large scale entrapment of hydrocarbons.
    [Show full text]
  • N Oguta Ke, Ngera
    Socio-economic appraisal of cage fish culture in Oguta Lake, Nigeria Item Type conference_item Authors Okorie, P.U. Download date 28/09/2021 07:25:58 Link to Item http://hdl.handle.net/1834/18755 SOCOECONOMC APPRASAL OF CAGE FSH CULTURE N OGUTA KE, NGERA BY PETER U. OKORIE Department ofAnimai and Environmental Biology, ltrwStateUniversity, IM.B.2000,Owerri, Nigeria. ABSTRAC'L (\gutalake is one of the largest natural lakes in south-eastern Nigeria.Traditionally, its fisheries support a large number of fill-time and part-time fishermen with their families. However, in recent years, like most other capture fisheries in Nigeria, fish yields have either been declining or stagnating. Fish stocks in the lake have for long been subjected to over-fishing and use of wrong fishing methods.. The paper proposes large-scale introduction of cage fish culture in the lake as a practical means of reducing fishing pressure on the lake as wellas providing a sustainable means of livelihood for the local population around the lake. Limnological characteristics of lake are described to appraise the feasibility of cage culture in the lake. Recommendations are made on the design, choice of materials, construction and management of cages in the lake. Cost-benefit projections based on prevailing market prices are presented. INTRODUCTION With a surface area of over 300 ha(Ita and Balogun, corresponding high fishing pressure on the lake. 1983), Lake Oguta is the largest natural lentie If this fishing pressure is allowed to continue, the system in the Imo river basin of southeastern fish yields fromthe lake will go into decline (if it Nigeria.
    [Show full text]
  • Research Paper an Update on the Fish and Fisheries of Lake Oguta, Nigeria
    Academia Journal of Environmetal Science 5(1): 013-021, January 2017 DOI: 10.15413/ajes.2017.0229 ISSN: ISSN 2315-778X ©2017 Academia Publishing Research Paper An update on the fish and fisheries of Lake Oguta, Nigeria Accepted 18th January, 2017 ABSTRACT The paper attempts to review the current trends in fisheries activities in Lake Oguta, Nigeria with the aim to finding a lasting solution to the declining fisheries of the Lake. Lake oguta is the largest standing freshwater body in South-Eastern Nigeria and is of immense importance to thousands of people in Oguta Local Government, Nigeria. The lake supports about 2, 403 full-time and 154 part-time fishers. About 80% of the fishers in the Lake obtain their protein from the Lake. Virtually, all the households in the Lake participates in fisheries activities from time to time. The fishers employ cast nets, gill nets, fish traps, seines, hooks and line etc most of which are locally made but increasingly, much of the gears are made locally using modern materials like nylon twine or rope in the case of gill nets. Recently, the fishers and fisheries of the Lake are faced with some challenges which include overfishing, pollution, eutrophication, aquatic weeds, decline in fish biodiversity, illegal, unreported and unregulated fishing, ineffective monitoring, control and surveillance (MCS) and poverty, lack of alternative livelihoods and inadequate social legislation as well as, some destructive fishing methods. The free access to the resources of the lake has caused the resources to be biologically and Sanda MK, Kwaji BP, Ajijola KO, economically overfished.
    [Show full text]
  • 4.Leonard Nwosu and Doris Ndubueze
    Human Journals Research Article February 2017 Vol.:5, Issue:4 © All rights are reserved by Leonard Nwosu et al. Geoelectric Investigation of Water Table Variation with Surface Elevation for Mapping Drill Depths for Groundwater Exploitation in Owerri Metropolis, Imo State, Nigeria. Keywords: Water table, surface elevation, drill depth, resistivity, groundwater. ABSTRACT A total of 20 Vertical Electrical Soundings (VES) were *1Leonard Nwosu and 2Doris Ndubueze carried out in different locations in Owerri Metropolis, Imo state of Nigeria in order to investigate water table variation 1. Department of Physics University of Port with surface elevation for assessment of groundwater Harcourt, Nigeria. potential. Field data were acquired using the OHMEGA-500 resistivity meter and accessories. The Schlumberger electrode 2. Department of Physics Michael Okpara University configuration with maximum electrode spread of 700m was adopted. At each VES point, coordinates and elevations were of Agriculture Umudike, Nigeria. measured using the Global Positioning System (GPS). The field data were interpreted using the Advanced Geosciences Submission: 2 February 2017 Incorporation (AGI) 1D software and the Schlumberger automatic analysis version. The results revealed that the area Accepted: 7 February 2017 is underlain by multi geoelectric layers with about 6 to 9 Published: 25 February 2017 lithological units identified. The aquiferous layer is composed mainly of fine sand and sandstone units with low resistivity values recorded in Owerri West Area. The resistivity values ranged from 0.6Ωm to 1100.8Ωm. The depth to the water table varied across the area with surface elevation and ranged from 16.80m to 85.6m. Similarly, the aquifer thickness www.ijsrm.humanjournals.com ranged from 13.23m to 111.56m.
    [Show full text]
  • The Example of Imo State; Nigeria
    Waste Management as a Correlate of Environmental Sustainability in Sub- Saharan Africa: The example of Imo State, Nigeria Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades an der Julius- Maximilians-Universität Würzburg ABSTRACT If Sub-Saharan Africans understand the value of waste and handle it correctly and introduce “political hygiene” in governance, the issue of a filthy environment, unemployment, hunger, malnutrition and Vorgelegt von poverty will be greatly minimised. Nghengwa Ache Patience Juli 2019 Eingereicht am 10. Juli 2019 Von Nghengwa Ache Patience 1. Betreuerin Prof. Dr. Barbara Sponholz 2. Betreuer Prof. Dr. Roland Baumhauer 3. Betreuer Prof. Dr. Jürgen Rauh 1. Gutachterin Prof. Dr. Barbara Sponholz 2. Gutachter der Dissertation Prof. Dr. Jürgen Rauh 1. Prüfer Prof. Dr. Barbara Sponholz 2. Prüfer Prof. Dr. Jürgen Rauh 3.Tag der mündlichen Prüfung 14. Oktober 2019 (The quotation “political hygiene” was used by the Kenyan Professor - Patrick Loch Otieno Lumumba in Tanzania on June 29, 2017). (Cover picture: Oldest waste picker at the Old Road Landfill besides Nwaorie River Owerri, Imo State, Nigeria on February 9, 2017). “Africa must do her own growing, no matter how tall her neighbours are.” This work was completed with the assistance of the “DAAD STIBET Abschlussbeihilfe” I dedicate this work to waste pickers and waste users. Summary Introduction. Rapid and uncontrolled industrialisation and urbanisation in most developing countries are resulting in land, air and water pollution at rates that the natural environment cannot fully renew. These contemporary environmental issues have attracted local, national and international attention. The problem of urban garbage management is associated with rapid population growth in developing countries.
    [Show full text]