GOVERNMENT OF INDIA MINISTRY OF WATER RESOURCES CENTRAL GROUND WATER BOARD GROUND WATER INFORMATION BOOKLET HASSAN DISTRICT, KARNATAKA ARSIKERE BELUR HASSAN CHANNARAYAPATNA ALUR SAKLESHPUR HOLENARSIPUR ARKALGUD SOUTH WESTERN REGION BANGALORE AUGUST 2007 FOREWORD Ground water contributes to about eighty percent of the drinking water requirements in the rural areas, fifty percent of the urban water requirements and more than fifty percent of the irrigation requirements of the nation. Central Ground Water Board has decided to bring out district level ground water information booklets highlighting the ground water scenario, its resource potential, quality aspects, recharge – discharge relationship, etc., for all the districts of the country. As part of this, Central Ground Water Board, South Western Region, Bangalore, is preparing such booklets for all the 27 districts of Karnataka state, of which six of the districts fall under farmers’ distress category. The Hassan district Ground Water Information Booklet has been prepared based on the information available and data collected from various state and central government organisations by several hydro- scientists of Central Ground Water Board with utmost care and dedication. This booklet has been prepared by Shri S.S.Hegde, Scientist-B, under the guidance of Dr. K.Md. Najeeb, Superintending Hydrogeologist, Central Ground Water Board, South Western Region, Bangalore. I take this opportunity to congratulate them for the diligent and careful compilation and observation in the form of this booklet, which will certainly serve as a guiding document for further work and help the planners, administrators, hydrogeologists and engineers to plan the water resources management in a better way in the district. Sd/- (T.M.HUNSE) Regional Director HASSAN DISTRICT AT A GLANCE Sl.No. Items Statistics 1 General information i) Geographical area (sq.km) 6845 ii) Administrative Division (As on Jan-07) Number of Tehsils 8 Number of Panchayats 150 iii) Population (as per 2001 census) 1721669, Rural-1416996, Urban-304673 iv). Average annual Rainfall (mm) 977.6 (Av. 10 years: 1996 -2005) 2 Geomorphology i) Major physiographic units 3 Physiographic Units a) Western Malnad b) Central Semi-Malnad c) Eastern Plain area ii) Major Drainages Cauvery, Hemavathy and Yagachi 3 Land Use (sq.km.) a). Forest area 688 b). Net area sown 3737 4 Major soil types Red sandy soil, Red silty-clayey soil, Mixed soil, and Black soil. 5 Area under principal crops (as on 31.3.2006) Ragi 1425.4 Paddy 395.3 Maize 217.2 Oil seeds 138.2 Horticultural crops 1133.4 6 Irrigation by different sources (area in hectare) Dugwells 1459 Tube / bore wells 32732 Tanks / ponds 16898 Canals 20052 Other sources 5315 Lift irrigation 123 Net irrigated area 76579 Number of structures 49127 7 Numbers of ground water monitoring wells of CGWB 49 (dugwells) (As on 31.3.2007) 08 (piezometers) 8 Predominant geological formations Gneiss, Schist & Granite 9 Hydrogeology • Major water bearing formations Weathered & fractured Gneiss, Schist & Granite • Pre-monsoon Depth to water level 1.40 – 21.67 during 2006 (in mbgl) • Post-monsoon Depth to water level 1.00 – 19.42 during 2006 (in mbgl) • Long term water level trend in 10 • Rise from 0.02m to 0.48m years (1997-2006 in m/yr) • Fall from 0.004m to 0.98m 10 Ground water exploration by CGWB (as on 31.3.2007) • Total No of wells drilled EW 26 OW 08 PZ 03 • Depth Range (m) 31.5 – 235.0 m bgl • Discharge (Lps) Less than 1 lps to 9.04 lps • Transmissivity (m 2/ day) 2 to 63 m 2/day 11 Ground water quality • Presence of chemical constituents Nitrate more than permissible limit) Calcium-Magnesium Bicarbonate • Type of water and Chloride type 12 Dynamic ground water resources (in MCM) • Annual Replenish able GW resource 517.60 • Net annual GW draft 367.03 • Projected demand for domestic and industrial uses up to 2025 78.25 • Stage of GW development 71% 13 AWARENESS AND TRAINING ACTIVITIES • Mass Awareness Programme Nil Organised • Water Management Programmes Organised th th Date 16 & 17 Dec. 2004 Place Hassan No. of participants 25 14 Efforts of artificial recharge & rainwater harvesting • Projects completed by CGWB Nil (No. & Amount spent) • Projects under the technical guidance Nil of CGWB(numbers) 15 Ground water control and regulation • No of OE Blocks Parts of Chennaraya-patna (80% of area), Holenarsipur (73%), Hassan (54%) and Arsikere • No of Critical Blocks (17%). • No of Blocks notified Nil Nil 16 Major ground water problems and issues Declining water level (Resource) and excess nitrate and chloride contamination. Hydro chemical quality problems in different parts on a localized scale HASSAN DISTRICT 1.0 Introduction Hassan district is located on the border of the Western Ghats, in the southern part of Karnataka state. It is located between 12 ° 30’ and 13 ° 35’ North latitude and 75 ° 15’ and 76 ° 40’ East longitude. Hassan town is the district headquarters and the district is divided into eight taluks viz. Alur, Arkalgud, Arsikere, Belur, Chennarayapatna,Hassan, Holenarsipur and Sakleshpur ( Figure 1 ). Population of the district (2001 census) is17, 21,669 of which 14, 16,996 is rural and 3, 04,673 is urban. The major part of the district is in Cauvery main basin drained by Cauvery, Hemavathy and Yagachi rivers, which flow towards east to join the Bay of Bengal. A small part on the eastern side is falling in west flowing minor river basin ( Figure 2 ). Agriculture is the main activity of the people in the district. The net sown area comprises 55% of the total geographical area. Paddy, ragi, jowar, groundnut and pulses are the important agricultural crops and coffee and areca nut are the main horticulture crops. About 20.5% of the net sown area is irrigated by surface water (11.4%) and ground water (9.1%) sources. Hemavathy reservoir is a major irrigation project and Yagachi is a medium Irrigation Project in the district. Central Ground Water Board has carried out Systematic Hydrogeological Survey, Reappraisal Hydrogeological Survey and Ground Water Exploration in the entire district. Under exploration programme, 26 exploratory wells, 8 observation wells have been drilled. Under Hydrology Project 3 piezometers were drilled for observing the water levels. As reported, there were 137 suicide cases among farmers in Hassan district in the last four years (2003-2006), of which 15 cases were due to crop failures and the remaining were due to other reasons. Further, during 2006-07, 19 suicide cases have been reported, for which the details of number of suicide deaths due to crop failure are not available. Maximum farmers suicide cases of 4 each have occurred in Arsikere and Channarayapatna taluks followed by 3 in Hassan taluk, 2 in Sakleshpur taluk and 1 each in Arkalgud and Belur taluks. No suicide cases have been reported from Alur and Holenarsipur taluks. The maximum number of suicide cases (11) have occurred during 2003-04 and incidentally the 2003 happens to be the year which received the lowest rainfall in the last 10 years in most of the taluks, as seen in the rainfall data given in Table 2 . Stage of ground water development is also high in Arsikere (87.71%) and Channarayapatna (76.27%) taluks, where highest number of suicide cases of 4 each have occurred. Taluk wise farmers’ suicide cases in Hassan district is given in Table 1 . Table-1. Talukwise statistics of farmers’ suicide cases in Hassan district. 2003-04 2004-05 2005-06 Total Taluk 07 - 6 200 Sl.no Totalreported cases Totalreported cases Due to loss Crop Due to other reasons Totalreported cases Due to loss Crop Due to other reasons Totalreported cases Due to loss Crop Due to other reasons Due to loss Crop Due to other reasons 1 Hassan 14 2 12 7 0 7 8 1 7 29 3 26 7 2 Arsikere 16 4 12 8 0 8 2 0 2 26 4 22 4 3 Alur 5 0 5 5 0 5 2 0 2 12 0 12 2 4 Sakleshpur 4 2 2 2 0 2 0 0 0 6 2 4 2 5 Arkalgud 7 0 7 2 0 2 5 1 4 14 1 13 1 6 Belur 7 0 7 3 0 3 3 1 2 13 1 12 3 7 Chennaraya- 13 3 10 7 1 6 12 0 12 32 4 28 0 patna 8 Holenarsipur 3 0 3 0 0 0 2 0 2 5 0 5 0 Total 69 11 58 34 1 33 34 3 31 137 15 122 *Source: Agricultural Commissioner, Govt. of Karnataka, Bangalore. 2.0 Rainfall The average rainfall of the district (1996-2005) is 977.62 mm. The analysis of the last 10 years data reveals that the highest (Av.2050.3mm) rainfall has occurred in Sakleshpur taluk, which is adjoining the Western Ghats and the lowest (Av.733.3mm) in Arsikere taluk, which is in Maidan (Plain) region. The orographic influence on rainfall is clear from the spatial distribution. Therefore, rainfall is decreasing as one proceeds from the western part of the district to the eastern part. Taluk wise rainfall data from 1996 to 2005 is presented in the Table 2 . A perusal of the table shows that the district has received above average rainfall during 2005 and it is the wettest period in the last 10 years. Table 2.Talukwise rainfall statistics of Hassan district. (Rainfall in mm) pur Alur Year Belur Hole- Sl.No. Sl.No. Hassan narsipur Arsikere Channa- Saklesh- Arkalgud rayapatna 1 1996 854 943 506.2 824 667 700 630 1345 2 1997 1197 1171 971 996 982 961 1067 2916 3 1998 1046.2 746.6 816.4 835.7 634.1 801.1 864.7 2163.2 4 1999 1236.1 759.2 967.8 871.5 776.3 841.9 1007.9 2256.2 5 2000 963.3 899 859 1132.5 817.3 935.8 871.3 2314.7 6 2001 781 778 484 724 759 691 568 1690 7 2002 670 714 708 682 723 547 464 1372 8 2003 622 611 606 524 474 494 439 1429 9 2004 966 897 603 991 880 766 571 2317 10 2005 1287 1184 812 1246 1002 1166 1119 2700 Average 962.3 870.3 733.3 882.7 771.5 790.4 760.2 2050.3 3.0 Geomorphology and soil types 3.1 Geomorphology The district is divided into three distinct geomorphic units i.e.