tut1a Q_Embankment Dam_Borrow Sources

Calculate a 30 minute SCS triangular unit hydrograph for a watershed of area 550 ha and time of concentrationof 50 minute and draw a triangualar unit hydrograph.

T t + 1. Flow 3LH 3/2 2. Length = 70 ft 3. Crest height = 60 ft Hydrology HW1// Route the flood hydrograph indicated below through a reservoir. The storage (elevation versus volume) data obtained from the reservoir survey are given. The spillway has the following characteristics: • Flood Routing • Reservoir Routing • HW1// (1 = புர் ||| Prepared by Dr Nabil Al Amery Inflow Time (hr) Flow (cfs) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 0 600 2100 2500 1600 950 550 300 80 0 فلاتر O 4th year civil engineering class Storage Date Elevation Storage (ft) (acre ft) 60 61 62 63 64 65 300 330 360 395 430 470 × إضافة شرح... > mum

The spillway of the large dam is designed by you for 58 years-flood and its cofferdam for 8 years-flood. The lifetime of the dam is 63 years, and the construction period of the dam is 5 years by the specification you signed. Determine: a) The risk of the spillway for its design flood. b) The risk of the cofferdam for its design flood. c) The probability that the design flood of the spillway occurs twice during the construction period of the dam. d) The probability that the design flood of the cofferdam occurs at least twice during its lifetime. e) If the maximum risk of the dam and cofferdam should be 1% according to the specification you signed, estimate the return periods of their design floods. f) According to above computations, comment on the changes that you should do in your designs as a design engineer. 11:34

1. In your own words, differentiate the following types of dam: a. Diversion Dam b. Buttress Dam c. Embankment Dam

Basic design requirements of an earthen dam

Determine the discharge of a distributary at the tail end from the following data: Gross Command Area (GCA) = 20000ha Cultivable Command Area (CCA) = 70% Losses beyond the tail end = 1 m³s-1 Kharif Rice Rabi Wheat Irrigation Kor depth Kor period intensity 19 cm 15% 2.5 weeks Irrigation Kor depth intensity 13.5 cm 30% Sugarcane Irrigation Kor depth intensity 16.5 cm 10% Kor period 4 weeks Kor period 4 weeks

|Q3|// Irrigation water is conveyed from a reservoir to an irrigation project through an earthen 10 km length of the channel at a rate of 25 m²/sec, the seepage losses from the [1] m /sec channel were estimated to be 0.1 The depth of irrigation water to be applied is km 10 cm, and the water is supplied to the field one day per irrigation. Determine: - The discharge applied from the farm gate, Efficiency of conveyance Ec, efficiency of irrigation Ea, and the water losses in field. Assume that losses in the field occurred after (two-third) of the time of irrigation.

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hydrology flood estimation and control

OTO 'T (1 • HW1// Route the flood hydrograph indicated below through a reservoir. The storage (elevation versus volume) data obtained from the reservoir survey are given. The spillway has the following characteristics: 1. Flow 3LH 3/2 2. Length = 70 ft 3. Crest height = 60 ft Hydrology • Flood Routing • Reservoir Routing • HW1// = t + ||| Prepared by Drab Al Amery Inflow Time (hr) Flow (cfs) 0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 0 600 2100 2500 1600 950 550 300 80 0 فلاتر O 4th year civil engineering class. Storage Date Elevation Storage (ft) prope (acre ft) 60 61 62 63 65 300 330 360 395 430 470 إضافة شرح... × mum

We are to determine the seepage (infiltration) in a 250 hectare reservoir. The reservoir has 0.50 m^3/s of inflow, 0.3 m3/s of outflow, and total storage increase of 19600 m^3. A discharge of 0.1 m^3/s of water is coming out of reservoir to be used for irrigation of the around farms AUSGS gage next to the lake reservoir recorded a total of 20 mm Precipitation for the lake for a week. The evaporation loss, in mm is 24mm.T-0. Calculate the leakage (seepage) in mm for a week from this dam reservoir.(use 4 decimal in your answer donot put unit) e.g. 3.456mm put 3.4560 in your answer

Compute the 4-hr Snyder's synthetic unit hydrograph for a watershed with an area of 27.8 square miles and a main channel length of 16.3 miles. The main channel length from the outlet to the point opposite the centroid of the watershed is 5.4 miles. The regional parameters are C₁ = 1.7 and C₂ = 0.5. Plot the resulting hydrograph and label the lagged time to peak (tr), time to peak (TDR). peak discharge (Q₂R), and time base (T₁). (similar to 8.4.4)

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Hydrology The following table gives values of measured discharges at a stream gauging site in a year. Upstream of the gauging site a weir built across the stream diverts 4.0 Mm^3 and 1.5 Mm^3 of water per month for irrigation and for use in an industry respectively. The return flows from the irrigation is estimated as 0.50 Mm^3 and from the industry at 0.40 Mm3 reaching the stream upstream of the gauging site. Estimate the natural flow. If the catchment area is 200 km^2 and the average annual rainfall is 200 cm, determine the runoff-rainfall ratio.

Hydrology  1. List the factors affecting the seasonal and annual runoff (Yield) of a catchment. Describe briefly the interactions of factors listed by you.   2. With the help of typical hydrographs describe the salient features of (i) Perennial,(ii) intermittent, and (iii) ephemeral steams.   3. Explain briefly:(a) Water year(b) Natural (Virgin) flow.

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Problem 1 The storage, elevation and outflow data of a reservoir are given below in Table 1. When the spillway crest is at elevation 300.2 m, the following flood given in Table 2 was expected into the reservoir. If the reservoir surface is at elevation 300.00 m at the commencement of the inflow, route the flood to determine the (a) the outflow hydrograph (b) the reservoir elevation vs time curve Table 1 Elevation, m Storage (S) 106 m3 Outflow discharge (Q) m³/s 299.5 4.8 300.2 5.5 300.7 19 301.2 6.6 50 301.7 7.2 94 302.2 7.9 144 302.7 8.8 200 Table 2 Time, h Flood discharge, m3/s 13 3 25 6 65 75 12 66 15 54 18 40 col i

4. A 60 mi² drainage area has the following characteristics: longest flow path length of 10 mi, flow path length from outlet to centroid of 3.2 mi, overland slope of 0.05, curve number of 82, basin coefficient of 1.35, and storage coefficient of 0.6. a. Derive a 1-hr: i. Snyder UH ii. SCS triangular UH. b. Plot the resulting hydrographs (together on one plot) and comment on the differences in peak discharge, peak timing, hydrograph shape, and volume between the two.

Subject-Hydrology ...Solve it correctly

As a Hydraulic Engineer you are required to design a dam to create a reservoir in Amman City, open channel and pumps to convey water from the reservoir to a downstream community, and a pipe network to distribute the water within the community. Based on the hydrology assessment of the watershed the dam height was set to 12 m above ground level, with a freeboard of 2m (water level in the dam is 10m), dam width of 60m, and downstream flow was set at 8.5 m3/s  Your task as an engineer is to provide a water supply for a planned community. Your project will involve (as a minimum): No assumptions are needed. But, the backslope of the dam is 2V/1H instead of 2H/1V

With an observation well situated is 69.7 ft away from the pumping well (which is pumping at the rate of 305 gal/min). The aquifer is confined, and the depth has been measured from well logs and is 150 ft. t (min) s (ft) 0.072 0.003 0.105 0.006 0.155 0.012 0.222 0.02 0.322 0.026 0.472 0.03 0.688 0.034 1.005 0.037 1.472 0.041 2.238 0.047 3.238 0.052 4.738 0.062 6.738 0.072 10.072 0.087 15.905 0.107 21.905 0.116 31.905 0.129 46.905 0.149 67.905 0.171 100.91 0.203 150.91 0.239 220.91 0.276 351.9 0.33 500.9 0.36 687.9 0.39 1001.9 0.43 1481.9 0.46 2202.9 0.49 3103.9 0.51 4336.9 0.54 Could someone please show using this data how to calculate transmissivity (T), the hydraulic conductivity (K) and Storativity (S) for the aquifer. Thank You

If the following runoff is created by 5 hours of rainfall with a depth of 30 cm. What is the catchment area in sq km? Hours 0 2 4 60 00 8 10 12 14 16 18 20 22 Discharge (m3/s) Ancuier 4 0 21 48 33 24 18 13.5 9 6 4 5 0 Search

Question 4: The isohyets due to a storm in a watershed were calculated and the areas bounded by the isohyets were tabulated as below: Isohyets (inch) Area (mi^2) 10-8 30 8-6 140 4-6 80 2-4 180 0-2 20 Estimate the mean rainfall over the basin

A Dam is constructed on a river to control its water for irrigation the surface area of the lake (reservoir) created upstream the dam is 100 mile2, during a certain month, evaporation losses of reservoir are estimated to be 8 mm/day, and the total rainfall depth is 80 mm, inflow to the reservoir is 25 m3/sec, average irrigation duty is 10m3/sec, average hydropower demined is 15 Mm3, seepage is 4 mm/day, domestic water duty is 5 Mm3, Ground water flow to the reservoir 2mm/day the change in storage during this month is 1000 hectare, meter Determine 1- The change of water depth in the 2-Reseravour efficiency.

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