Aquaculture is dependent upon a supply of water. This result reveals pond consumptive water use and water balance in fish-rice integrated system. Water balance variables were measured daily from meteorological station and computed following the standard procedure. Total water input and output in fish culture were 318.0923 m3 and 26.631 m3 respectively while rice cultivation were 79.9722 m3 and 6.5732 m3 measured on a daily basis with an overall presented on weekly records with an average water balance for rice paddy and fish culture at 75.1563m3 and 297.4433m3 respectively. Fish growth showed the consumptive water used for production (kg/m3) from fingerlings to table size in integrated pond. Thus indicating the required amount of water used for productivity at different weeks. Rice growth showed the water requirements for paddy in an integrated pond used throughout productive period. Water use efficiency based on rice growth shown increase weekly due aquaculture effluent without fertilizer treatment. The results showed that water channels could be strongly influenced by weather and climate pattern affecting farming activities. Hence IAA is an acceptable practice which ensures multiple and conjunctive use of scare water resources for higher productivity farm outputs and future strategies for enhancing water productivity.

Keywords: Water use efficiency; Water balance; Rice plant; fish growth; Rice paddy