Water storage for irrigation

How can water storage be provided for irrigation?

Water storage for irrigation can be provided through water harvesting with small dams (32), managed aquifer recharge (33), and better management of soil moisture (34). Yet, existing irrigation systems often rely on gray infrastructure in the form of dammed reservoirs (30, 31) to provide water storage (30, 35 – 37).

How do you calculate storage-fed irrigation?

The potential for this storage-fed irrigation, SFI, is calculated as SFI (B) = min (| Δ − (B) |, Δ + (B)). Thus, if the absolute water deficit in a basin over all months is smaller than the sustainable water surplus, only the water needed to meet that supply needs to be stored.

How can existing infrastructure contribute to future storage-fed irrigation?

In basins with existing irrigation storage, maintenance of catchments and reservoirs, and thus reducing the amount of storage lost to sedimentation, is crucial to ensure that existing infrastructure can contribute to future storage-fed irrigation in the long-term (56). Managing Water Demand to Reduce Water Storage Deficits.

How many km 3 /yr would be from storage-fed irrigation?

Of those 540 km 3 /yr, 195 km 3 /yr would require temporary storage. Thus, when using sustainable water resources on currently irrigated and currently rainfed lands, 460 km 3 /yr would be from storage-fed irrigation: that is, using sustainable blue water which has undergone temporary storage (Fig. 1 A). Fig. 1.

How much storage water is needed for irrigation?

Of the 67 km 3 /yr, 61 km 3 /yr of stored water resources would supply irrigation on currently irrigated cropland (hatched bar area in Fig. 1 B). An additional 6 km 3 /yr of storage is required for expanding storage-fed irrigation to rainfed croplands (nonhatched bar area in Fig. 1 B).

Can temporary water storage be leveraged for sustainable irrigation?

We quantify global volumes of water that requires temporary storage to be leveraged for an expansion of sustainable irrigation and discuss options to provide that storage.