Sabarmati

This report by the Central Water Commission (CWC) attempts to provide the water quality scenario of our rivers and evolve a methodology for identifying hot spots in Indian rivers. The water quality data is based on the average values observed during the last ten years (2001-2011) at 371 monitoring stations of CWC on almost all major, medium and minor rivers in India. In respect of Dissolved Oxygen and Biochemical Oxygen Demand, the Central Pollution Control Board's classification has been considered for evaluating the hot spot in the rivers.

The physical and chemical quality of river water is important in deciding its suitability for drinking purposes. As such the suitability of river water for potable uses with regard to its chemical quality has to be deciphered and defined on the basis of the some vital characteristics of the water. Bureau of Indian Standards (BIS) vide its document IS: 10500:1991, edition 2.2 (2003‐09) has recommended the quality standards for drinking water and these have been used for finding the suitability of river water. On this basis of classification, the natural river water of India has been categorized as desirable, permissible and unfit for human consumption.

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This report by the Observer Research Foundation (ORF), Mumbai deals with the study on the neglect and virtual turning of the river Mithi in Mumbai into a sewer. The river, along with its estuarine reach, provides the much-needed green lungs to the city in the form of mangroves. Neglect of this river was the main cause of the catastrophic floods in Mumbai on 26 July, 2005, which claimed nearly 1,000 lives. In what could be a monumental urban transformation initiative to be undertaken anywhere in India yet, ORF has proposed a grand vision for the reclamation of Mithi River. The study report and a documentary film ’Making the sewer a river again - Why Mumbai must reclaim its Mithi’ on the dreadful conditions of the river, was released in May, 2011 in Mumbai.

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The report by Carewater INREM Foundation deals with groundwater and well water quality in the alluvial aquifers of Central Gujarat. Gujarat has a hydrogeology representative of almost all aquifer types and depositional & formation eras. Contamination of aquifers along with scarcity of groundwater resources due to increase in water demand and reduction in recharge of groundwater from changing landuse, is a problem in Central Gujarat.Read More

The report presents regional flood frequency curves developed by fitting L-moment based GEV distribution to annual maximum peak flood data of small to medium sized catchments of the seven hydrometeorological sub-zones of zone 3 and combined zone 3 of India. The effect of regional heterogeneity is studied by comparing the growth factors of various sub-zones and combined zone 3. The flood frequency curves based on probability weighted moment (PWM) approach have been compared with the flood frequency curves based on L moment approach.Read More