Q ST QUA TAT ALIT US O TY IN OF W N IN WA NDIA ATER A- 2 R ...

15.2 Water Quality Monitoring in Krishna BasinThe water quality monitoring of the River Krishna are being done in the basin bythe State Pollution Control Boards of Maharashtra, Karnataka and AndhraPradesh. The monitoring locations are on mainstream of River Krishna (26) andtributaries- Bhadra, Bhima, Ghataprabha, Malprabha, Muneru, Musi, Nira, Paleru,Tunga, Tungabhadra, Panchganga, Chandrabhaga, Kagina, Koyna, Mula, Mutha,Mula-Mutha, Venna, Pawana, Indrayani, Hundri, Kundu, Ghod, Sina, Urmodi,Nakkavagu and Vel. The ranges of water quality observed in River Krishna andits tributaries with respect to Temperature, pH, DO, Conductivity, BOD, Nitrate,Nitrite, Total Coliform (TC) and Faecal Coliform (FC) are presented as minimum,maximum and mean value to assess the extent of water quality variationthroughout the year.15.2.1 Water Quality of River KrishnaThe water quality of River Krishna with respect to pH, Conductivity and DO arelargely meeting the water quality criteria at all the locations except DO at RajapurWeir (1.7 mg/l) & Kurundwad in Kolhapur (2.8 mg/l) in Maharashtra andHamsala Deevi (3.9 mg/l) in Andhra Pradesh and Conductivity at Hamsala Deevi(8570 µmhos/cm) in Andhra Pradesh. The BOD ranges from 0.4 to 16.0 mg/l. Themaximum value of BOD (16.0 mg/l) is observed at D/s of Devasagar Bridge inKarnataka. Other locations having high BOD are Krishna Bridge at Karad (10.5mg/l), Rajapur Weir (9.6 mg/l), Krishna-Venna Sangam at Mahuli (8.4 mg/l), Wai& Kshetra Mahuli (8.0 mg/l), Sangli (7.5 mg/l), Kurundwad in Kolhapur & D/s ofIslampur (6.5 mg/l) and Mahabaleshwar Dhom Dam (4.5 mg/l) in Maharashtra;Gadwal Bridge (7.9 mg/l), Thangadi at Mahaboobnagar (7.3 mg/l), WadapallyA/c with River Musi (4.8 mg/l) and A/c with Tungabhadra (3.2 mg/l) in AndhraPradesh and U/s of Ugarkhurd Barrage & Ankali Bridge (3.2 mg/l) in Karnataka.The Faecal Coliform ranges from 2–9000 MPN/100ml whereas the TotalColiform ranges from 4–16000 MPN/100ml. The Total and Faecal Coliform doesnot meet the criteria at D/s of Devasagar Bridge in Karnataka (TC 16000MPN/100ml & FC 9000 MPN/100ml). The water quality status of River Krishnais given in Annexure-I Table 15.1. The water quality status of mainstream ofRiver Krishna with respect to BOD, DO, Total Coliform, Faecal Coliform andConductivity is given in Figure 15.1 to 15.3.119