HYDROLOGY PROJECT

Hydrology Project Phase-I was implemented with the assistance of World Bank and

technical consultancy assistance from Govt.of Netherlands and the project come to effective

in Karnataka State on 10-12-1996. The project was implemented over a period of 7 years

and ended on 31-12-2003.

The overall project implementation objective was to develop an Integrated

Hydrological Information System providing reliable, accurate, comprehensive and timely

hydrological, meteorological and water quality data.

In order to achieve the set objectives various infrastructure like well designed

monitoring network for groundwater levels, installation of digital water level recorders

(DWLR’S) upgrading of water quality laboratories, establishment of data centers were

implemented over the period of project. The groundwater level monitoring network is

increased by constructing 500 purpose built piezometers across the State. The Department

was monitoring the groundwater levels through 1561 stations which included 1058 dug wells,

503 piezometers prior to implementation of project.

After the implementation of project the number of monitoring network increased to

1819 stations which included 785 dug wells and 1034 piezometers.

The other components implemented under Hydrology Project Phase I are:

• Installation of 500 Nos.of DWLR’S in the State.

• Establishment of two Regional Data Centre at Mysore & Bellary and 19 District Data

Centers.

• Computerization of all Historical and current data in respect of station details,

lithology water level, water quality etc.

• Upgradation of one level 2+ laboratory at Bangalore and four level 2 laboratories at

Mysore, Bellary, Belgaum and Gulbarga.

• Advanced water quality equipments like AAS, Gas chromatograph, ion meters was

procured for high end analysis

• As part of human resource development 1067 number of officials were trained in

various subjects like basic computers, Hydrometry, basic chemistry., GWDES, GEMS

etc.,

• Total project cost Rs.131.68 millions.

Hydrology Project phase-II is a follow on project of Hydrology Project Phase-I. Main

project developmental objective is to extend is promote the sustained and effective use of

Hydrological Information system, developed under phase-I, by all potential users connected

with water resources planning and management leading to improvement in productivity and

cost effectiveness of water related investments.

Main components of the project are:

I. Institutional strengthening

II. Vertical Extension

Decision Support System – (Planning):

The Consultants will be developing five generic DSS and they are

1. Surface water planning

2. Integrated reservoir operation

3. Conjunctive use of water

4. Water quality management

5. Drought management

Two on going DSS(P), studies in Karnataka are -

a. Tungabhadra b. Palar

Purpose Driven Studies (PDS):

The project taken up under purpose Driven Study is “ Urban Groundwater Hydrology

and water quality in and around Bangalore City’. The main objectives of the project are:

• Identify problematic areas with reference to each problem.

• To strengthen network stations for monitoring micro level changes in water

level and water quality.

• To study the harmful effect of commercial exploitation of groundwater on

aquifer system and suggest remedial measures.

• Indentify areas suitable for infiltration galleries in the city to recharge the

aquifer.

• To identify future water resource infrastructure needs and develop plans to

address them.

• To formulate best fit groundwater wage model for the city environment.

• Assessing the cumulative effects of management actions to minimize the

impacts of urbanization on tanks.

• Provide baseline geologic and geohydrologic information for a typical

crystalline rock aquifer setting in Bangalore.

• To create rapid awareness among different water users.

Status of Ground water utilization in Karnataka State: (as on 31-03-2004)

The Groundwater assessment for Karnataka State is done on watershed basis and the same have been reappropriated to taluks. Details are as follows:

• Net annual ground water availability – 15.29 lakh hectare meter

• Existing ground water draft for all users – 10.71 lakh hectare meter • Ground water available for further irrigation development – 6.47 lakh hectare meter

Categorisation of watersheds as per the assessment made for all the 234 watersheds :

a. Overexploited : 80 b. Critical : 10 c. Semi Critical : 17 d. Safe : 25 e. Mixed (OE-C-SC) : 102

TALUK

a. In 15 districts 43 taluks categorised as OE b. In 23 districts 69 taluks categorised as Mixed

District/taluk wise details of Over exploited, Critical and Semi-critical blocks of Groundwater in Karnataka (as on 31-03-2004)

Sl.No. District Over exploited taluks Mixed category taluks (OE, Critical and Semi-critical)

1 Bagalkot Badami, Bagalkot and Hunagund Bilgi, Jamakhandi and Mudhol 2 Bangalore(Rural

) Devanalli, Doddaballapur, Hoskote and Nelamangala

3 Bangalore(Urban)

Anekal, Bangalore North and Bangalore South

4 Belgaum Athani and Ramadurg Bailahongal, Chikkodi, Gokak, Hukkeri, Raibagh and Soundatti

5 Bellary Hadagali Bellary, H.B.Halli , Kudligi and Sirguppa

6 Bidar Bhalki and Bidar

7 Bijapur Bagewadi, Bijapur, Indi, Muddebihal and Sindagi

8 Chamarajnagar Chamarajnagar, Gudlupet and Kollegal

9 Chikkaballapur Chikkaballapur, Chintamani, Gouribidanur, Gudibande and Shidlaghatta

Bagepalli

10 Chikkamagalur Chikkamagalur, Kadur and Tarikere

11 Chitradurg Holalkere and Chitradurg Challakere, Hiriyur and Hosdurga

12 DakshinaKannada

Bantwal and Mangalore

13 Davanagere Chennagiri, Davanagere, Harapanahalli, Harihar and Jagalur

Honnali

14 Dharwad Navalgund 15 Gadag Naragund and Ron Gadag and Mundaragi 16 Gulbarga Afjalpur and Shorapur

17 Hassan Arasikere, Belur, C.R.Patna, Hassan and Holenarasipura

18 Haveri Byadagi and Ranebennur Haveri and Hirekerur

19 Kolar Bangarpet, Kolar, Malur, Mulabagilu, and Srinivasapur

20 Koppal Yelburga Gangavati, Koppal and Kushtagi

21 Mandya K.R. Pete and Malavalli Maddur, Pandavapur and SrirangaPattana

22 Mysore H.D.Kote, Hunusur, Mysore, Nanjanagud, T.Narasipur

23 Raichur Lingasugur 24 Ramanagar Channapattana, Kanakapur and

Ramanagar Magadi

25 Shimoga Shikaripur and Shimoga 26 Tumkur Koratagere, Madhugiri and Tiptur CNHalli, Gubbi, Kunigal, Pavagad,

Shira, Tumkur and Turuvekere

Total District: 15, Taluks: 43 District: 23, Taluks: 67 OE=more than 100% , Critical= 90% to 100%, Semicritical= 70% to 90% of Groundwater utilisation.

Out of 29 districts Kodagu, Udupi and Uttarakannada are in the category of Safe districts and out of 175

taluks 65 are safe. This categorisation does not apply for Command Area Villages.

The observation borewell located at Doddaguni village, Tumkur district

indicates that the water level was at 20mts depth during 2000, from 2002 onwards and upto 2007 the water level has continuously fallen and reached nearing 60 mts depth. During 2008 the water level has increased by about 12 mts.