The Working Group on Technological Issues drew up its list of issues as:.Rainwater harvesting techniques for different geo-hydro thermo regionsRisk management in rainwater harvestingCapacity assessment for rainwater harvestingInnovative water storage techniquesGroundwater rechargeConventional water-borne sanitation systemWater Storages and Wetlands.Recommendations:.Basin/sub basin should be treated as unit of water resources planning.Critical irrigation to crop during production (is essential) can be provided through rain water harvesting.Small scale decentralized water harvesting should be important part of water policy and planningIt should not be random but based on scientific inputs. Unsuitable/marginal areas should be avoidedDownstream effects should be accounted forInstitutional arrangements at the basin level are necessary to avoid conflicts, but centralization must be avoidedThe harvested water should be primarily used to recharge aquifersSocial or other sanctions are necessary to ensure the economical and equitable use of the harvested water.Location of effective recharge structures to be identified with GIS, geophysical, resistivity survey..