; (K) activities reducing or preventing groundwater depletion or promoting groundwater recharge; (L) technical assistance to improve existing irrigation practices to provide water supply benefits; (M) the investigation of, and pilot projects for, brackish water development and aquifer storage and recovery; (N) the lining of irrigation ditches and canals to reduce water loss and improve efficiency; (O) assistance to municipal water management entities for water supply planning in preparation for and in response to dry, critically dry, and below normal water years, including— (i) hydrological forecasting; (ii) identification of alternative water supply sources; and (iii) guidance on potential water transfer partners; and (P) any other assistance the Secretary determines to be necessary— (i) to increase available water supplies; (ii) to reduce water supply-demand imbalances in a hydrologic system; (iii) to maintain the health of river ecosystems