Jagalur Taluk, Davanangere District, Karnataka

Draft Report क� द्र�यभू�म �ल बो जल संसाधन, नद� �वकास और गंगा संर�ण मंत्रा भारत सरकार Central Ground Water Board Ministry of Water Resources, River Development and Ganga Rejuvenation Government of India Report on AQUIFER MAPPING AND MANAGEMENT PLAN Jagalur Taluk, Davanangere District, Karnataka द��ण पि�चमी �ेत, ब�गलोर South Western Region,Bengaluru FOR OFFICIAL USE ONLY No. Naquim-Taluk-15/2016-17 Government of India Ministry of Water Resources, River Development & Ganga Rejuvenation Central Ground Water Board JAGALUR TALUK AQUIFER MAPS AND MANAGEMENT PLAN DAVANAGERE DISTRICT, KARNATAKA STATE JAGALUR TALUK By Dr. A.Asokan Scientist ‘D’ Central Ground Water Board South Western Region Bangalore March 2017 JAGALUR TALUK AQUIFER MAPS AND MANAGEMENT PLANS, DAVANAGERE DISTRICT, KARNATAKA STATE CONTENTS Sl. No. Chapter Page No. Title 1 SALIENT INFORMATION 1 2 AQUIFER DISPOSITION 6 GROUND WATER RESOURCE, EXTRACTION, 9 3 CONTAMINATION AND OTHER ISSUES 4 GROUND WATER RESOURCE ENHANCEMENT 10 5 DEMAND SIDE INTERVENT IONS 12 JAGALUR TALUK AQUIFER MAPS AND MANAGEMENT PLAN, DAVANAGERE DISTRICT, KARNATAKA STATE 1. SALIENT INFORMATION Name of the taluk : JAGALUR District : Davanagere State : Karnataka Area : 978 sq.km. Populatio n: 1, 71,822 Annual Normal Rainfall : 546 mm 1.1 Aquifer management study area Aquifer mapping studies was carried out in Jagalur taluk, Davanagere district of Karnataka, covering an area of 978 sq.kms under National Aquifer Mapping Project. Jagalur taluk of Davanagere district is located between north latitude 14 024’18.5” and 14042’16.0” & east longitude 76006’34.7” and 76032’02.2”, and is covered in parts of Survey of India Toposheet Nos. 57B/2, 57B/3, 57B/6, 57B/7 and 57B/10. Jagalur taluk is bounded by Kudligi taluk on north, Chitradurga taluk on south, Challakere taluk on east and Harpanahalli taluk on western side. Location map of Jagalur taluk of Davanagere district is presented in Figure-1. JAGALUR TALUK Fig 1: Location Map of Jagalur taluk, Davanagere district 1 Taluk administration of Jagalur taluk is divided into 3 Hoblies and Jagalur is only one town, which is also the taluk head quarter. There are 135 inhabited and 36 uninhabited villages in Jagalur taluk. 1.2 Population According to 2011 census, the population in Jagalur taluk is 171822, in which 154565 constitute the rural population and 17257 is the urban population, which works out to 90% (rural) and 10% (urban) of the total population of taluk. The study area has an overall population density of 176 persons per sq.km. The decadal variation in population from 2001-2011 is 8.14 % in Jagalur taluk. 1.3 Rainfall Jagalur taluk enjoys semi-arid climate. Dryness and hot weather prevails in major part of the year. The area falls under Central Dry agro-climatic zone of Karnataka state and is categorized as drought prone. The normal annual rainfall in Jagalur taluk for the period 1981 to 2010 is 546 mm. Seasonal rainfall pattern indicates that, major amount of (298 mm) rainfall was recorded during South-West Monsoon seasons, which contributes about 54% of the annual normal rainfall, followed by North-East Monsoon season (147 mm) constituting 27% and remaining (102 mm) 19% in Pre-Monsoon season (Table-1). On Computations were carried out for the 30 year blocks of 1981- 2010, the mean monthly rainfall at Jagalur taluk is ranging between 1mm during January to 106 mm during October. The coefficient of variation percent for pre-monsoon, monsoon and post monsoon season is 66, 32 & 56 percent respectively. Annual CV at this station works out to be 29 percent (Table-1). Table 1: Statistical Analysis of Rainfall Data of Jagalur Station, (1981 to 2010) STATION JAN FEB MAR APR MAY PRE JUN JUL AUG SEP SW OCT NOV DEC NE Annual NRM 1 5 6 25 66 102 65 61 76 96 298 106 34 7 147 546 JAGALUR STDEV 3 13 14 26 59 67 44 41 38 56 94 69 47 14 83 156 CV% 369 290 251 105 90 66 67 67 50 58 32 65 137 204 56 29 1.4 Agriculture & Irrigation Agriculture is the main occupation in Jagalur taluk. Major Kharif crops are maize, ragi, tur and vegetables. Main crops of Rabi season are ragi, maize, horse gram, groundnut, and sunflower (Table-2). Water intensive crops like sugarcane and paddy are not grown. Maize is grown in 43% and oil seeds in 19.5% of total crop area of taluk. Cotton accounts 15% of total crop area. 2 Table 2: Cropping pattern in Jagalur taluk 2014-2015 (Ha) Ragi Year Fruits Maize Jowar Paddy Pulses Cotton Cotton Oil seeds Vegetables Sugarcane Sugarcane Area under cultivation (Ha) 2014-2015 1 25306 3483 1219 2391 875 4393 11363 23 8904 It is observed that net sown area accounts 58% and area sown more than once is 5% of total geographical area in Jagalur taluk (Table-3). 100% of net area irrigated is only from bore wells (Table-4). Table 3: Details of land use in Jagalur taluk 2014-2015 (Ha) Area not Total Area Net Area sown available Fallow Taluk Geographical under sown more than for land Area Forest area once cultivation Jagalur 95527 12688 5677 9673 55580 4976 Source: District at a glance 2014-15, Govt. of Karnataka Table 4: Irrigation details in Jagalur taluk (Ha) Net area % of area Source of Irrigation irrigated (Ha.) Canals 0 0 Tanks 0 0 Wells 0 0 Bore wells 13264 100% Lift Irrigation 0 0 Other Sources 0 0 Total 13264 Source: District at a glance 2014-15, Govt. of Karnataka 1.5 Geomorphology, Physiography & Drainage The geomorphology of the district is characterized by vast stretches of undulated plains interspersed with sporadic ranges or isolated clusters of low ranges of rocky hills (Fig.-2). Jagalur taluk falls in the eastern hilly region. The Jagalur taluk, Davangere district falls under Krishna River basin. The important rivers of the district are Tungabhadra and its tributary, Chikka Hagari. The drainage network is influenced by South West monsoon (Fig.-3). 1.6 Soil Major part of the taluk is covered by red sandy soil and followed by black soil. The Red Sandy soil comprises of red loams, red sandy, sandy loams and medium black soils. 3 Fig 2: Geomorphology Map Fig 3: Drainage Map 1.7 Ground water resource availability and extraction Aquifer wise total ground water resources up to 200 m depth are given in Table-5 below. Table-5:Total GW Resources (2013) (Ham) Taluk Annual replenishable Fresh In-storage GW Total availability of fresh GW GW resources resources resources Phreatic Fractured Dynamic +phreatic in-storage (Down to 200m) + fractured Jagalur 8701 22388 2512 33602 1.8 Existing and future water demands (as per GEC- 2013) • Net ground water availability for future irrigation development : 4.24 MCM • Domestic (Industrial sector) demand for next 25 years : 7.91 MCM 1.9 Water level behavior (a) Depth to water level Aquifer - I • Pre-monsoon: 2.0 – 10.0 mbgl (Fig.-4) • Post-monsoon: 2.0 – 10.0 mbgl (Fig.-5) Aquifer - II • Pre-monsoon: 5.0 – 40.0 mbgl (Fig.-6) • Post-monsoon: 10.0 – 40.0 mbgl (Fig.-7) (b) Water level fluctuation Aquifer-I (Fig.-8) • Seasonal Fluctuation: Rise ranges upto 2.0 m; Fall ranges upto 2.0 m Aquifer-II (Fig.-9) • Seasonal Fluctuation: Rise shows upto 4.0 m; 4 Fig 4: Pre-monsoon Depth to Water Level (Aq-I) Fig 5: Post-monsoon Depth to Water Level (Aq-I) Fig 6: Pre-monsoon Depth to Water Level (Aq-II) Fig 7: Post-monsoon Depth to Water Level (Aq -II) Fig 8: Water Level Fluctuation (Aq-I) Fig 9: Water Level Fluctuation (Aq-II) 5 2. AQUIFER DISPOSITION 2.1 Number of aquifers: In Jagalur taluk, there are mainly two types of aquifer systems; i. Aquifer-I (Phreatic aquifer) comprising Weathered Granite Gneiss / Schist ii. Aquifer-II (Fractured aquifer) comprising Fractured Granite Gneiss / Schist In Jagalur taluk, granitic-gneisses and schists are the main water bearing formations (Figure- 10). Ground water occurs within the weathered and fractured granitic-gneisses and schist under water table condition and semi-confined condition. In Jagalur taluk bore wells were drilled from a minimum depth of 132 mbgl to a maximum of 200 mbgl (Table-6). Depth of weathered zone (Aquifer-I) ranges from 5.7 mbgl to 36.74 mbgl (Figure-11). Ground water exploration reveals that aquifer-II fractured formation was encountered between the depth of 30 to 200 mbgl. Yield ranges from 0.21 to 18.56 lps. The basic characteristics of each aquifer are summarized in Table-7. Fig 10: G eology Map Fig 11: Weathered thickness map (Aq-I disposition) 6 Table 6: Details of Ground water Exploration Depth Casing T Fracture Zones SWL Q DD S.No Location Latitude Longitude Drilled Depth (m2/ (mbgl) (mbgl) (lps) (m) (mbgl) (m) day) 1 Suraddihalli 14°30'40'' 76°13'40'' 200 11.95 2 Shettygondanahalli 14°30'20'' 76°14'40'' 200 11.85 121.30,175,190 40.87 0.21 55.13 3 Malammanahalli 14°30'30'' 76°14'0'' 200 24.3 146 21.95 0.21 72.77 4 Uddaboranahalli 14°41'30'' 76°7'30'' 200 11.7 110 0.21 99.00, 5 Chadargola 14°28'40'' 76°11'30'' 200 11.72 42.44 0.96 56.8 136.00,192.00 6 Hosakere 14°36'44'' 76°17'49'' 200 29.25 17.92 1.2 6.5 - 7 Bangaralanagudda 14°31'46'' 76°25'16'' 200 19 9.82 1.69 12.74 - 8 Chikkaujani 14°42'5'' 76°19'45'' 200 18 3.3 1.83 19.04 26.3 9 Magadi 14°40'20'' 76°10'20'' 200 11.7 30.00, 190.00 23 2.44 5.27 10 Belichodu 14°29'50'' 76°9'50'' 183.2 5.74 108.00,182.00 41.48 2.84 11 Bennehalli 14°28'40'' 76°24'20'' 200 5.7 72.00, 137.00.

Load more