2 Calculate the total rainfall depth for a watershed in Dallas, Texas with anual exceedance probability...
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A rainfall with a duration of 3 hrs on a 73.6 Square mile (190.8 square km) catchment Resulted in the following Runoff hydrograph. US UHG SIUHG Runoff hydrograph And UHG for 3-hr Storm 0.0 529.5 706.0 0.0 689.3 919.1 2527.4 232 3676.2 41.0 2757.2 307 2205.7 1470.5 16.4 919.1 689.3 0.0 15 7.7 2824.0 15 24.6 21 1129.6 706.0 529.5 0.0 12178.5 ftA3/s 1.32E+08 32 20 15 7.7 0.0 30 0.0 345.0 mA3/s 3.73E+06 DRV> 73.7...
Hydrologic analysis of a watershed Problem2: The unit hydrograph is the direct runoff generated by 1 unit (I mm in this problem) of excess rainfall. The one-hour unit hydrograph of a watershed is given by: 4 Time (hour) -0.9 U0.4 U0.2 0.0 0.0 U-0.6 Unit hydrograph (m/s/mm) (a) The 100-year storm over the watershed has the following excess rainfall pulses: Fromt 0 to 1 hour, P45 mm From t I to 2 hours, P20 From t = 2 to 3...
Problem1 A recreational park is built near a stream. The stream channel can carry 200 m3/s, which is the peak flow of the 5-yr. storm of the watershed. Find the following: (a) The probability that the park will be flooded next year. (b) The probability that the park will be flooded at least once in the next 10 years (c) The probability that the park will be flooded 3 times in the next 10 years. (d) The probability that the...
A 23-acre watershed undergoes development. The runoff
coefficients (C) for pre-development and post-development
conditions are 0.2 and 0.4, respectively. The pre-development and
post-development times of concentration are 0.25 and 0.15 hour,
respectively. Estimate the depth (in.) and volume (acre-ft) of
detention storage required using the loss-of-natural-storage
method. Assume that the IDF curve shown in Figure 2.4 applies and
that the design policy requires control for a 10-year event. (Use
Triangular Hydrograph Method)
Baltimore, Maryland 1903-1951 20.0 15.0 Note Frequency analvsis...
2. The figure below represents the hydrological response (a total precipitation depth of 2-in in 24 hours), for a 200 acres watershed before and after the headwaters and central area of the watershed have been developed. The ordinance for the county where the development was observed requires you to design a pond (58 ft deep) capable to hold the entire additional volume of runoff that exceeds the hydrologic response observed before development. 4+? 18 | Qp = lofth 3 16...
Calculate (a) The junction depth xy and the total amount of dopant into p-type substrate with a bulk concentration CB of 5 * 1015 cm" after phosphorous pre deposition at 1000 °C for an hour (b) The junction depth xy of the sample in (a) after drive-in diffusion at 1100 "C for unction depth , of the sample in (o) after drive-in diflsion t 110 C for 3 hours.
1. Calculate the junction depth and the total amount of dopant introduced after boron predisposition performed at 950 oC for 30 minutes in a neutral ambient. Assume the substrate is n-type silicon with ND=1.8x1016 cm-3 and the boron surface concentration is Cs=1.8x1020 cm-3. Assume Do=0.76 cm2/sec and EA=3.46 eV. 2. If the sample in Prob1 is subjected to a drive in diffusion at 1050 oC for 60 min calculate the diffusion profile and junction depth.
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Annual maxima rainfall is used in frequency analysis for hydrological design purposes. Table 1 shows the annual maxima of 1-hour rainfall duration from year 1985 until 2005 that has been processed from rainfall records of a catchment. Table 2 shows the different land use types and the corresponding area in hectare (ha) of the catchment. The IDF curve for the catchment has constant values as given in Table 3. Answer the following questions: Table 1 Year...
Calculate the junction depth and the total amount of dopant introduced after pre deposition process performed at 975 ° C using diborane gas for 60 minutes in a neutral ambient. Assume the substrate is n- type silicon with ND = 3.6 × 10^16 cm-3 and the boron surface concentration is Cs = 3 × 10^19cm-3.
Problem 2: Designing Culverts Under a Bridge on El Rio de las Aguas Torenciales A 100-year stom event is being considered in order to design the culverts under a bridge. Figure 3 shows the storm event that may fall on the rural watershed of area 3.2 Km that drains into El Rio de las Aguas Torenciales. It generates runoff all over the watershed. The runoff flows into the river towards the ast point A (Figure 4) in the watershed where...