(Civil engineering hydrology) 8 Thiessen polygons and isohyetal map are given in Fig. P 2.25 and P 2.26, respectively, for differ.ent drainage basins. Areas and precipitation values are tabulated. Compute the average precipi-tation over the basins.StationABEFGHArea of basinZoneIIIIIIIVVVIArea of basinPolygonal areas9.3 cm10.5 cmThiessen polygonarea(km²)1701641561501163612442= 958 km²10.9 cm12.8 cm%12.2 cmArea (km²)561924202444458= 1014 km²Flg. P2.25 Thiessen polygonsBasin boundary14.2 cm14.0 cmE13.5 cmPrecipitation(cm)9.310.510.912.213.514.014.212.8

Thiessen Polygon method is far superior to airthmetic mean method in term of error minimising.…

ent drainage basins. Areas and precipitation values are tabulated. Compute the average precipi- tation over the basins. Station B с D E F G H Area of basin Zone I 11 III IV V VI Area of basin Polygonal areas 9.3 cm 10.5 cm Thiessen polygon area (km²) 170 164 156 150 116 36 Ce 10.9 cm 124 42 -958 km³ 12.8 cm 12.2 cm Area (km²) 56 192 420 244 44 58 = 1014 km² Flg. P2.25 Thiessen polygons Basin boundary Ge 14.2 cm 14.0 cm 13.5 cm Precipitation (cm) 9.3 10.5 10.9 12.2 13.5 14.0 14.2 12.8

ent drainage basins. Areas and precipitation values are tabulated. Compute the average precipi- tation over the basins. Station B с D E F G H Area of basin Zone I 11 III IV V VI Area of basin Polygonal areas 9.3 cm 10.5 cm Thiessen polygon area (km²) 170 164 156 150 116 36 Ce 10.9 cm 124 42 -958 km³ 12.8 cm 12.2 cm Area (km²) 56 192 420 244 44 58 = 1014 km² Flg. P2.25 Thiessen polygons Basin boundary Ge 14.2 cm 14.0 cm 13.5 cm Precipitation (cm) 9.3 10.5 10.9 12.2 13.5 14.0 14.2 12.8

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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he areas enclosed by contour lines at 5 m interval for a reservoir upto the face of the proposed dam are as shown below value of Contour lines 100,510l0,1015,1020,1025,1030,1035 Area (m2) 653/2 ,653, 653*2, 653*8, 653*18 ,653*25 , 653*40 Taking 1005m and 1035 m as the bottom most level and the highest water level achievable of the reservoir. Determinethe capacity of the reservoir by Prismoidal formula.
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From the results of a hydrographic survey of a lake the following data were obtained. Aa = 1240.71 sq.m. (area enclosed by the boundary of the water surface) Ab = 752.79 sq.m. (area enclosed by contour B) Ac = 397.77 sq.m. (area enclosed by contour C) Ad = 178.44 sq.m. (area enclosed by contour D) Ae = 48.33 sq.m. (area enclosed by contour E) If the vertical distance (h) between contour levels is 1.50 m, determine the total volume of water in the lake above the level of contour E. Resolve the above problem if the vertical distance between contour levels is 2.0m. Which has a larger value of volume?
From the results of a hydrographic survey of a lake the following data were obtained. Aa = 1240.71 sq.m. (area enclosed by the boundary of the water surface) Ab = 752.79 sq.m. (area enclosed by contour B) Ac = 397.77 sq.m. (area enclosed by contour C) Ad = 178.44 sq.m. (area enclosed by contour D) Ae = 48.33 sq.m. (area enclosed by contour E) If the vertical distance (h) between contour levels is 1.50 m, determine the total volume of water in the lake above the level of contour E.
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List three places or sources where hydrological data can be obtain
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A catchment is idealized as a 30km × 30km square. It has four rain gauges as . During a month, the precipitation at these gauges is measured as A=(309) mm, B=(292) mm, C=(279) mm and D=(297) mm. Compute the average precipitation (in mm, up to one decimal place) over the catchment during this month by using the Thiessen polygon method. [11]A BD C
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