Question

A.2. Hydrographers have measured the flow at a cross section on 29 Km Swamp (Paya Indah Wetland) to be 10m/sec. At a point 1 km downstream, flow is recorded to be 12m/sec. A computer simulation predicts groundwater flow into the swamp to be 2.01 litres/sec per metre of swamp length. If the stream and reed bed has a combined width of 100m in this part of the swamp, estimate the daily evapotranspiration rate per m² of swamp. Assume steady state conditions.

Answer 1

Im3/ 12m3/s B 29km ground water flow into the Swamp = 2:01.& pcs m of swamp length 201x10 m3 5 per m for llem ground water flow = 201 XIOʻxiom3 S = 2:01 m/s the difference between A&B discharges = 12-10 = 2m3/s

loss in water = 2.01-2 = 0 olm3/s. evaporation 001m3/s evaporation = Dolm3/s 100 x 1 km 0.0lm 315 100mx103 1x107mis = 10mmis daily evaporation =104x24x60x60 8.64 mm /