Design a swale to convey a runoff of 60 ft3/s at a slope of 3%. The grassed swale will be located on Karst soil which is easily erodible and covered with Reed Canarygrass. The roughness coefficient is 0.05. No stormwater treatment (water quality check) is required. Show all the calculations to

Determine the discharge for a stream with a total cross-sectional area of 2m2 and the wetted perimeter is 4m over a bottom slope of 1% if the roughness coefficient of the earthen material forming the stream is 0.035.

The section of a canal begins at the progressive 0 + 000 with the bottom level 210.50 meters above sea level and ends at the progressive 4 + 000 with the level 207.30 meters above sea level, crossing a ML-CL type soil to irrigate an area of 2000 hectares, with an irrigation module 1.20 Its / s / ha. Determine the tie and template respectively for a section with minimal infiltration. Consider the maximum recommended speed depending on the characteristics of the soils.

Q1 ): A stream of 135 l/s was delivered from a canal and 110 l/s were delivered to the field. An area of 2.6 ha was irrigated in 10 hrs. Effective depth of root zone was 1.8m. The runoff loss in the field was 530 m². The depth of water penetration is varying from the head end of the field to the tail end as shown in the sketch below. Available moisture holding capacity of the soil is 47 cm for the total depth of soil. Determine water conveyance, water application, water storage, and water distribution efficiencies. The irrigation was started at a moisture extraction level of 65% of the available moisture. 1.8 Head end 1.7 1.65 1.5 + 1.46 + 1.4 + 1.35 Tail end

Acatchment area which is having a slope of 3% and a loamy soil has four gauging stations. Determine the net irrigation requirement in m if the crop factor on the area is 0.495 and the pan evaporation is 201mm, the conveyance efficiency is 34%. The distance of GS1 to GS4 is 480km. GS1 to GS2 is 424km. GS2 to GS3 is 235km, GS3 to GS4 is 648km, GS1 to GS3 is 725km, and GS4 to GS2 is 771km. The rainfall depths recorded per year in GS1. GS2. G53, and G54 are 245mil 215mm, 178mm, and 150mm and the corresponding polygon areas of each gauging station is 50,845 hec. 480km2. 750km2, and 640km2. respectively

1. Consider a farm irrigation ditch in a loam soil having the following dimensions: a) Bottom width, 0.5 meters. b) Total depth, 0.60 meters. c) Side slopes of 1 horizontal to 1 vertical. d) Depth of water, 0.40 meters. Find the following properties: a) Cross-sectional area of the stream. b) Wetted perimeter. c) Hydraulic radius of the stream.

A biofiltration swale is to be laid on a 2% slope to handle a design peak runoff rate equal to 0.002 m³/s. During the wet season, the swale is expected to be covered with grass having an average height of 100 mm and Class E retardance. Design the swale.

A catchment area which is having a slope of 2% has four gauging stations. Determine the type of soil having the highest net irrigation requirement in m if the crop factor on the area is 0.495 and the pan evaporation is 201mm, the conveyance efficiency is 34%. The distance of GS1 to GS4 is 490km, GS1 to GS2 is 484km, GS2 to GS3 is 285km, GS3 to GS4 is 658km, GS1 to GS3 is 735km, and GS4 to GS2 is 778km. The rainfall depths recorded per year in GS1, GS2, GS3, and GS4 are 245mm, 215mm, 178mm, and 150mm and the corresponding polygon areas of each gauging station is 50,845 hec, 480km2, 750km2, and 640km2, respectively.

Design an irrigation channel in alluvial soil according to Lacey's silt theory with the following data, discharge is 50 m/sec. Lacey's silt factor = 1, side slope 1/2H : 1V %3D

Subject: irrigation engineering a)     What is field capacity and derive its relationship with water depth?   b)     Compare optimum moisture content with wilting point water content?