[Type a quote from the document or the summary of an interesting point. You can position the text Government of India box anywhere in the Ministry of Water Resources document. Use the River Development & Ganga Rejuvenation Central Ground Water Board Text Box Tools tab to change the formatting of the pull quote text box.] GROUND WATER YEAR BOOK KARNATAKA (2017-18) CENTRAL GROUND WATER BOARD SOUTH WESTERN REGION BANGALORE GROUND WATER YEAR BOOK 2017-18 SOUTH WESTERN REGION, KARNATAKA C O N T E N T S Sl. No. Item Page Nos. FOREWARD ABSTRACT 1. GENERAL FEATURES 1.1 Introduction 1 - 11 1.2 Physiography 1.3 Drainage 1.4 Geology 2. RAINFALL DISTRIBUTION IN KARNATAKA STATE-2016 2.1 Pre Monsoon Season -2017 12 - 20 2.2 South west Monsoon Season - 2017 2.3 Northeast Monsoon Season - 2017 2.4 Annual rainfall 21 - 46 3. GROUND WATER LEVELS IN KARNATAKA DURING WATER YEAR 2017-2018 3.1 Depth to Groundwater levels 3.2 Fluctuations in the ground water levels 4. HYDROCHEMISTRY 47 - 69 5. CONCLUSION 70 - 71 List of Figures Fig. 1.1: Agroclimatic Zones Fig. 1.2: Drainage Fig. 1.3: Geology Fig. 2.1: Percentage departure from its normal for the Pre monsoon season 2017 Fig. 2.2: Percentage departure from its normal for the South West monsoon season 2017 Fig. 2.3: Percentage departure from its normal for the Post-monsoon season 2017 Fig. 2.2: Percentage departure from its normal for the Year 2017 (Annual period) Fig. 3.1: Depth to water level, May 2017 Fig. 3.2: Depth to water level, August 2017 Fig. 3.3: Depth to water level, November 2017 Fig. 3.4: Depth to water level, January 2018 Fig. 3.5: Ground water fluctuation May 2017- November 2017 Fig. 3.6: Ground water fluctuation May 2017 - January 2018 Fig. 3.7: Ground water fluctuation May 2016 - May 2017 Fig. 3.8: Ground water fluctuation August 2016 -August 2017 Fig. 3.9: Water level fluctuation November 2016 –November 2017 Fig. 3.10: Water level fluctuation January 2017- January 2018 Fig. 3.11: Change in groundwater level Mean (May 2007 to May 2016) – May 2017 Fig. 3.12: Change in groundwater level Mean (Aug 2007 to Aug 2016) – Aug 2017 Fig. 3.13: Change in Groundwater level Mean (Nov 2007 to Nov 2016)- Nov 2017 Fig. 3.14: Change in Groundwater level Mean (Jan 2008 to Jan 2017) – Jan 2018 Fig. 4.1: Distribution of EC in Karnataka State (May 2016) Fig. 4.2: Distribution of Chloride in Karnataka State (May 2016) Fig. 4.3: Distribution of Fluoride in Karnataka State (May 2016) Fig. 4.4: Distribution of Nitrate in Karnataka State (May 2016) List of Tables Table 1.1: District wise distribution of NHS in Karnataka Table 1.2: Agroclimatic zones and Area, Karnataka Table 1.3: Basin sub basin and Drainage Area Table 1.4: Basin wise distribution of NHS stations Table 1.5: The geological succession in Karnataka State Table 1.6: Formation-wise distribution of Hydrograph Network Stations. Table 2.1: District-Wise Cumulative Rainfall and Departure During Pre-Monsoon Period 2017 Table 2.2: District-Wise Cumulative Rainfall and Departure During South-West Monsoon Period 2017 District-Wise Cumulative Rainfall and Percentage Departure During North-East Monsoon Period Table 2.3: 2017 Table 2.4: District-Wise Cumulative Rainfall and Departure During 2017 Annual Period Table 3.1: Depth to Water Table Distribution of Percentage of Observation Wells -May 2017 Table 3.2: Depth to Water Table Distribution of Percentage of Observation Wells -August 2017 Table 3.3: Depth to Water Table Distribution of Percentage of Observation Wells -November 2017 Table 3.4: Depth to Water Table Distribution of Percentage of Observation Wells -January 2018 District Wise - Fluctuation and Frequency Distribution From Different Ranges from May 2017 to Table 3.5: Aug 2017 District Wise - Fluctuation and Frequency Distribution From Different Ranges from May 2017 to Table 3.6: Nov 2017 District Wise - Fluctuation and Frequency Distribution From Different Ranges from May 2017 to Table 3.7: Jan 2018 District Wise - Fluctuation and Frequency Distribution From Different Ranges from May 2016 to Table 3.8: May 2017 District Wise - Fluctuation and Frequency Distribution From Different Ranges from Aug 2016 to Table 3.9: Aug 2017 District Wise - Fluctuation and Frequency Distribution From Different Ranges from Nov 2016 to Table 3.10: Nov 2017 District Wise - Fluctuation and Frequency Distribution From Different Ranges from Jan 2017 to Jan Table 3.11: 2018 Table 3.12: District Wise - Fluctuation of Water Level With May 2007-2016 Mean and May 2017 Table 3.13: District Wise - Fluctuation of Water Level With Aug 2007-2016 Mean and Aug 2017 Table 3.14: District Wise - Fluctuation of Water Level With Nov 2007-2016 Mean and Nov 2017 Table 3.15: District Wise - Fluctuation of Water Level With Jan 2008-2017 Mean and Jan 2018 Table 4.1 Ground water, during May quality of SWR -2016 Table 4.2 Details of well shows Electrical conductivity more than 3000 s/cm at 25o C during May 2016 Table 4.3 List of wells showing Chloride more than permissible limit of 1000 mg/L during May 2016 Table 4.4 List of wells show fluoride more than permissible limit of 1.5 mg/l during May 2016 Table 4.5 List of wells showing Nitrate more than permissible limit of 45 mg /l during May 2016 List of Annexures Annexure-I Status of Ground Water Monitoring Stations in Karnataka 2017-18 Annexure-II District and Taluk wise Normal and Actual Rainfall 2017 Annexure-III Ground water level data of GWM wells in Karnataka (2017-2018) Annexure-IV Hydrochemical data of Water level Monitoring Stations, Karnataka, May 2016 CONTRIBUTORS’ PAGE PRINCIPAL AUTHORS Ms.D.Dhayamalar, Scientist-D Smt Rakhi U.R, Scientist-B Dr Lubna Kouser, AHG DATA COLLECTION HYDROCHEMISTRY Sri M.Muthukannan, Scientist –D Dr.K.Ravichandran, Sc-D Shri.A.Balachandran, Scientist-D Sri S.S.Hegde Scientist-D Smt Lalitha B.H, STA (Ch) Dr.Sailee Bhange, STA (Ch) Sri T.Rajendiran Scientist-D Dr M.A.Farooqi Scientist-D Sri L.J.Balachandra, Scientist-D Sri A.Suresha, Scientist-D Sri.G.Krishnamurthy, Scientist-D Sri H.P.Jayaprakash, Scientist-C Smt Sandhya Yadav, Scientist-D Dr.Ananthkumar Ars., Scientist-D Sri.B.V.Chinagudi, Scientist-B Dr. J.Davithuraj, Scientist-B Smt Rakhi U.R, Scientist-B Smt Caroline Louis, Scientist-B Smt.Sangita P.Bhattacharjee, AHG Smt.Veena R.Achutha, AHG Smt. Bijimol Jose, AHG Sri J.Sivaramakrishnan, AHG Dr.S.Sreenivasa Vittala, AHG Dr Lubna Kouser, AHG Smt. V.Hemalatha, STA Sri.P.S.Prasad, Surveyor Sri.P.Narahari, Surveyor Sri.N.Ravikumar Surveyor Shri.D.N.Ranganath, Draugtsman SCRUTINY & ISSUANCE Report Processing Section CGWB, SWR, KARNATAKA FOREWORD Groundwater is a dynamic and replenishable precious natural resource, it requires to be monitored regularly and also to be appraised of the changes that are taking place in its regime. In this regard, Central Ground Water Board collects the groundwater level and quality data from the National Hydrograph Network stations. The water levels are monitored four times a year during the months of May, August, November and January and the samples for determination of the quality of the groundwater are collected once a year during the month of May. This report consists of the water level for the year 2017-18 and chemical quality data collected during the year 2016. Maps showing the depth to groundwater level in different parts of Karnataka and the changes observed in the water level in the last one-year and last one decade are included and discussed in the report. Groundwater stress areas where water levels are depleting as interpreted from the available data are also delineated. The report also consists of the discussions on distribution and variation of rainfall in the state for the year 2017. Chemical quality of groundwater on the basis of the samples collected during May 2014 and the interpretation of the data is included in the report. The data has been compiled, interpreted and presented by Ms.D.Dhayamalar Sc ‘D, Smt.Rakhi.U.R. Sc ‘B and Dr.Lubna Kouser, ‘AH. Analysis and presentation of Groundwater quality aspects is handled by Dr.K.Ravichnandran, Sc-D, Smt.Lalitha B.H STA (Chem.) and Dr.Sailee Bhange, STA (Chem.). A lot of labor has been put in by various personnel of SWR, Bangalore and WKSU Belgaum office for the collection of timely and reliable field data. The water samples were analysed by the Regional Chemical Laboratory to bring out the aspects of groundwater quality. Dr. M.A.Farooqi Sc. ‘D’ of Report processing section has carried out the necessary processing of the report to bring the report to the final stage. It is hoped that the information contained in this yearbook will be useful for planners and all the user agencies associated with development of water resources in the state. (Dr.A.Subburaj) Head of Office ABSTRACT Karnataka state has a geographical area of 1,91,761 Sq.km divided into 30 districts and 176 taluks. The Central Ground Water Board has collected water level data of the phreatic aquifer from 1477 Ground Water Monitoring Stations during the months of May, August, November 2017 and January 2018. This report contains the analysis and interpretation of the data. The actual average rainfall received in the State during the year 2017 was1108 mm 2 per cent more than the normal rainfall of 1091 mm and which fell under the ‘Normal’ category. Annual Normal rainfall varies from as low as 561mm at Bagalkot district to as high as 3722 mm at Udupi district.