An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the

Irrigation engg. ( civil )

There are currently 420 inhabitants in the small village of Pravino. The population is estimated to increase to 940 in thirty years. The current average peak flow is 1.2 L/s and is expected to increase to 2.14 L/s by 2050. The organic load is approximately 45 g BOD5/capita/day. The community is considering a free surface wetland or a lagoon to treat their wastewater.   1. Use the BOD loading to estimate the maximum surface area (in ha) required for a free surface wetland to serve the community by 2050 and remove BOD to 30 mg O2/L and TSS to 30 mg/L.

Example. A 3-m wide channel carries a total discharge of 12 m³ s¹. Calculate: S (a) (b) the critical depth; the minimum specific energy;