Dr. Rajendra has many awards under his belt—including Best Scientist Award from the Computer Society of India for his contributions in the field of life sciences and engineering; and the Nation Award for Basin Expert for Water Policy Planning from the River Water User Association in India. His research interests include watershed management, land use and water resource optimization, decision support systems, and expert systems. He has published exclusively in many international journals, and is on the editorial board of several national and international journals. He has also delivered many key note addresses in conferences around the world.
Managing Water Scarcity in Changing Climate
Global climate projections inherent uncertainties and indicated several extreme events in the last few decades including, change in temperature, floods, droughts and rain storms. Some of these changes have been due to natural causes but others can be attributed to human activities, causing greenhouse effects. Changing climate reflects the interplay among increasing carbon dioxide concentration; rising temperatures and changing water resources and affecting the hydrologic cycle. Water scarcity is closely related to the hydrological cycle and the physical laws that govern hydrological processes. World water withdrawal has been increased and affecting water budget. Various countries throughout the world are facing extreme water stress. Reduction in surface and ground waters has reduced flows and deteriorating water quality. Water scarcity is a critical constraint to agriculture in many parts of the world. The changing water scenario is affecting Food production and causing irrigation shortages. Water productivity became an important issue in improving the performance of irrigation in river basins. Meeting the basic water needs for drinking and agriculture is becoming a governance problem. It is necessary to adopt sustainable water management principles to enhance marketable yield of the crops for each unit of crop transpiration, reducing outflows and Enhancing the effective-use of rainfall.
Keywords: Climate Change, Water Scarcity, Water productivity, Sustainable Water Management.