Conjunctive use of water resources refers to simultaneous use of surface water and groundwater to meet the water demand. Individually in an un-organized way many farmers in canal, tank, and other surface irrigation systems combine surface water with groundwater to meet their irrigation requirements. Actually conjunctive use of water resources has to be a planned management strategy to be adopted, at the scheme and basin levels to optimize productivity, equity, and environmental sustainability by simultaneously managing surface and groundwater resources.

One of the major advantages of conjunctive use of water is the better utilization of poor-quality water to increase agricultural production and enhanced long-term environmental sustainability of irrigated agriculture in salinity dominated environments by improving salt balances and sustaining the productivity of irrigated agriculture.

Impact of conjunctive water use can be enhanced by managing the water resources at the river basin level, and to achieve this the river basin should become the unit area for the land & water management.

Conjunctive use through drip irrigation or any other micro-irrigation technique will be much more effective and meaningful.

Can be used conjunctively. If required some treatment of source groundwater can be done to reduce salinity.

Conjunctive use of canal water and groundwater through drip irrigation is great idea and in study is done in Utter Pradesh.

Regarding EC, along with type of crop, one should also keep in mind the quality of water with respect to the pores size in the pipes used for dripping. scaling may cause the blocking in of which causes high cost of maintenance.