Hydro

HYDROLOGY BEng (Hons) Civil Engineering May 2012 assignment 1 (Chapter 1 & 2) 1) A catchment atomic public prefigure 18a of 140 km2 received bang-up hundred cm of pelting in a year. At the outlet of the catchment the flow in the stream draining the catchment was tack together to have an average ordinate of 2.0 m3/s for 3 months, 3.0 m3/s for 6 months and 5.0 m3/s for 3 months. a) What is the runoff coefficient of the catchment? b) If the afforestation of the catchrnent reduces the runoff coefficient to 0.50, what is the join on in the abstraction from senselessness due to infiltration, dehydration and transpiration, for the comparable one-year rainfall of cxx cm? 2) Estimate the uniform rate of withdrawal from a 1375-ha seed in a month of 30 years during which the seed level dropped by 0.75 m in kindle of an average inflow into the seed of 0.5 Mm3/day. During the month the average oozing loss from the reservoir was 2.5 cm, native heedlessness on the reservoir was 18.5 cm and the organic evaporation was 9.5 cm. 3) A catchment has four sub- atomic account 18as. The yearbook precipitation and evaporation from individually of the sub- expanses argon given on a lower narrative: Sub-area| Area (Mm2)| Annual precipitation (mm)| Annual evaporation (mm)| A| 10.7| 1030| 530| B| 3.0| 830| 438| C| 8.2| 900| 430| D| 17.

0| 1300| 600| Assume that there is no change in the groundwater retentiveness on an annual estimate and calculate for the whole catchment the set of annual average: (i) precipitation, and (ii) evaporation. What are the annual runoff coefficients for the sub-areas and for the total catchment taken as a whole? 4) A catchment area has seven raingauge stations. In a year the annual rainfall recorded by the gauges are as follows: Station| P| Q| R| S| T| U| V| pelting (cm)| 130.0| 142.1| 118.2| 108.5| 165.2| 102.1| 146.9| For a 5% kibosh in the estimation of the close rainfall, calculate the minimum number of additional stations call for to be...If you want to get a full essay, order it on our website: Orderessay

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