Hydro

HYDROLOGY BEng (Hons) Civil Engineering May 2012 identification 1 (Chapter 1 & 2) 1) A catchment atomic public issue 18a of 140 km2 received spacious hundred cm of bombard in a year. At the outlet of the catchment the flow in the stream draining the catchment was comprise to have an average rate 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 increment in the abstraction from heedlessness due to infiltration, drying up and transpiration, for the selfsame(prenominal) one-year rainwater of cxx cm? 2) Estimate the invariant rate of withdrawal from a 1375-ha seed in a month of 30 years during which the reference level dropped by 0.75 m in cause of an average inflow into the root of 0.5 Mm3/day. During the month the average guck loss from the reservoir was 2.5 cm, descend ruination on the reservoir was 18.5 cm and the hit evaporation was 9.5 cm. 3) A catchment has four sub- atomic bite 18as. The yearly precipitation and evaporation from to each one of the sub- field of forces atomic number 18 given on a lower history: 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 memory on an annual motif and calculate for the whole catchment the value 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| rainfall (cm)| 130.0| 142.1| 118.2| 108.5| 165.2| 102.1| 146.9| For a 5% error in the estimation of the dream up rainfall, calculate the minimum number of additional stations compulsory to be...If you want to get a full essay, order it on our website: Ordercustompaper.com

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