Subject(s): Sustainable development -- Water harvesting -- Water resources development -- Water-supply -- Climate and Rainfall -- Ground Water -- Disquiet on water front : Overall per capita availability of water resources at present and in future -- Endowment of water resources : Climate and rainfall, monsoon, surface water resources, river basins of India, groundwater resources, crystalline rocks, volcanic rocks, sedimentary rocks, carbonate rocks, fluvial (alluvial) deposits, Aeolian deposits, sustainable groundwater potential, depletion and loss of water resources -- Definition and scope of water harvesting, traditions of water harvesting, rain water harvesting- roof water harvesting (RWH), In situ water harvesting -- Surface water harvesting : Optimal size of a surface water harvesting structure (SWHS), scientific basis for the construction of surface water harvesting, surface water harvesting structures in watershed, effect of SWHS on inflow to large dam -- Groundwater harvesting : Subsurface barriers, groundwater harvesting through aquifer transfer -- Water harvesting in low rainfall areas : Various types of traditional water harvesting structures (TWHS), use of modern knowledge to improve TWHS -- Artificial recharge : Advantages of subsurface storage, methods of artificial recharge, national status of artificial recharge technology, maintenance and efficiency of an artificial rechange scheme, well injection, air , artificial recharge and retrieval studies (ARR) -- Water harvesting and potability of groundwater : Excess fluoride in groundwater, alternative strategies for water supply, solutions to problem of excess arsenic in drinking water, chemical treatment methods, total dissolved solids, blackish and saline water -- Reduction of evaporation, miscellaneous topics in water harvesting, hope oases, innovative techniques and research and development needs, common strategy for sustainable supply of potable water- us eof a well and water harvesting structure in Tandem, reflections in future pond