12-14 September, 2011, Lucknow - Earth Science India

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National Conference on Science of Climate Change and Earth’s Sustainability: Issues and Challenges ‘A Scientist-People Partnership’ 12-14 September, 2011, Lucknow winter precipitation in the form of snow as well. Therefore, the Leh area is described as a cold desert, which has not witnessed such a rainfall in the recent past. On the fateful night of August 5 th 2010, the rainfall recorded at the Air Force Station at Leh, situated about 6 km from the catchment of Shaksaling nala was 12.8 mm. The rainfall lasted only for 15 minutes implying the cloud burst was highly localized. The sudden downpour resulted in runoff on the slopes, which had enough velocity to initiate movement of overburden comprising gravel, boulder and sand-silt matrix on the stream slopes. The water mixed with debris converted into a fast moving mass of the muddy water with high velocities of flow, having great destruction potential as it flowed down the streams. As a result , the debris flow over spilled the stream banks, laterally spreading in a wide area and carving out new undefined channels in the low lying areas causing widespread damages to the settlements falling along these newly carved out channels. In Leh area, the damage was confined to the catchment of Shaksaling nala, flowing from an elevation of 3800 m to 3410 m. The debris flow mobilized and damaged the settlements, bus stand building, BSNL building, hospital complex, radio station, etc. in its 3 km run-out distance. Further downstream, the debris flow washed away the bridge located near village Sabu and spread out in the downstream commands having a run-out length of about 26 km before reaching the Choklamsar village. This caused huge damage in the downstream Choklamsar village, ITBP Camp, Leh-Manali road, new Choklamsar market, etc. The bridges on Phyang, Taru, Umlah, Nimu, and Bazgo streams have been completely washed away. The concrete abutments of some of the bridges have also been severely damaged. This type of cloud burst is a rare occurrence in the area. As the stream courses are dry and only carry small quantity of discharge in the event of rainfall or snow melt, the stream courses have been occupied by human settlements. The scarcity of potable water prevailing in the area further compels the local population to construct houses in low lying areas near the stream banks. Therefore, it is concluded that due to change in the climatic regime of the Leh area, the natural catastrophe has taken place. However, the lesson learned from this has to be utilized to devise proper urban planning for the Leh area and no anthropogenic activity may be allowed along the stream courses. 104
National Conference on Science of Climate Change and Earth’s Sustainability: Issues and Challenges ‘A Scientist-People Partnership’ 12-14 September, 2011, Lucknow RAIN WATER HARVESTING: RESPONSE TO CLIMATE CHANGE AN OVERVIEW Sangeeta Yadav, Abhishek K. Singh and A.H. Khan * Environment Monitoring Division, Indian Institute of Toxicology Research, Mahatma Gandhi Marg, Post Box No. 80 -226001 * email: ahkhan2005@gmail.com Climate change is presently one of the most critical global challenges. Climate change makes an additional threat that puts increased pressure on the already stressed hydrological systems and water resources. The impact of climate change is already visible given that rainfall variability has intensified over the last two decades and it is recommended that appropriate adaptation measures must be taken. Rain Water Harvesting (RWH) is listed among the specific adaptation and responsive measures that the water sector needs to undertake to cope with future climate change. RWH is an environmentally friendly and low cost technology. With an insightful policy, rainwater harvesting can be promoted as a core adaptation and responsive strategy for achieving the global security and sustainability and water resources in an era of anthropogenic climate change. RWH is not only an alternative to centralized systems to water supply but can also reduce storm water runoff in urban areas and has the potential to increase the productivity of arable lands where water shortage is common because of scanty rainfall. The present paper to discusses the worth of rainwater harvesting as a response to climate change, especially in urban areas where water resources are fast depleting due to rapid increase in population and unrestricted use of water. Climate policy and water policy would require to be streamlined to promote rain water harvesting in the water stressed regions of the world. GEOMORPHIC EVOLUTION IN RESPONSE TO CLIMATE CHANGE AND NEOTECTONICS IN PART OF MID-GANGA PLAIN, AROUND ALLAHABAD, U.P. G.S. Tiwari Geological Survey of India, NER, Shillong email:gstgsi@rediffmail.com The Indo-Gangetic Plain (IGP) is situated in a peripheral foreland basin to the south of the rising Himalaya. The Ganga Plain foreland basin is a part of IGP and the 105
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12-14 September, 2011, Lucknow - Earth Science India

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