hydrology 1

Omran Geotechnical Company

Feasibility study and design of Qadis Khordak DamBadghis Province MRRD-628/WASIP/232/SPANISH-36/CC/BDS/92

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Hydrology Report of Qadis Khordak DamBadghis Province, Afghanistan26.1.2015

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SRTM digital mapsImaginary of Google EarthArcGIS softwareStudies and properties of physiographic of Qadis Khordak dam site1

Physiography DischargeFloodSediment Water Quality

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ParameterAreaKm2 perimeterKmLength of main StreamKm Average slope(present)Main stream net slope (present)Main stream Grass slope (present)height characteristics of the basin (m)Time of concentration (hours)Minimum elevation Maximum elevation Average elevationValue135652238.73.195.321630317021943.6

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QadisKhordakDamSite3

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All data were collected at 8 hydrometric stations in the area Analysis of hydrologic parameters such as discharge, flood, sedimentation and water qualityRowStationRiverLocationElevation (m)Area (km2)Data CountLat.Long.1BabulaiKashan35 2062 55575480052Bala MurghabMurghab35 3563 1948020497103ChekhcheranHarirud36 4268 503806100194ChichaktuChichaktu35 4464 0595343085Khush RabatSenjab34 4162 0714005796LangarKawgan34 1363 0012357585197Luka-i-SurkhBum35 1463 286581200108Tangi AzuKawgan34 0864 122315214217

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Select a 40-year period 1962 to 2011 as period statistical indexCompleted and prolongation data of selected stations No data in stations between 1991 and 2000Assess the quality station data using different TestsStatistical analysis of monthly and annual dischargeThe estimated monthly and annual discharge at the dam based on experimental and mathematical methods and select of Justin method as the preferred method Determined monthly and annual flow regime in long term period (40years)Discharge frequency analysis of monthly and annual7


RowTarget StationBase StationnRelationCorrelation Coefficient (R )Ave Q befor of Repair (m3/s)Ave Q After of Repair (m3/s)Change Percent1Tangi Azuqahdes15y = 0.0117*x - 2.18890.8121.8161.8411.372Langarqahdes18y = 0.0521*x - 9.36330.8537.3578.0899.963Chekhcheranqahdes17y = 0.1699*x - 23.2860.74932.07134.0226.084Khush rabatHerat9y = 0.0016*x - 0.07140.8750.3340.3494.345Luka I surkhqahdes7y = 0.0021*x - 0.46780.9330.3860.272-29.606Babulaiqahdes4y = 0.0156*x - 3.85470.9122.3511.471-37.447Bala marghabqahdes9y = 0.0065*x^ 1.53680.88155.56251.213-7.838Chichaktuqahdes6y = 0.0033*x - 0.48240.9490.7600.652-14.31

Relations and correlation coefficient (R) used to complete discharge data according to precipitation data8


RowStationMonthAnnualJanFebMarAprMayJuneJulyAugSepOctNovDec1Tangi Azu0.800.903.146.934.491.370.640.620.720.800.840.851.842Langar4.826.6416.0429.8116.844.141.951.832.413.104.714.798.093Chekhcheran5.206.1019.86122.07162.1650.8312.076.326.205.876.105.4834.024Khush rabat0.610.651.171.090.160.050.020.010.000.010.140.260.355Luka I surkh0.140.190.471.180.620.110.030.020.070.110.140.160.276Babulai0.861.723.676.622.120.110.040.010.040.290.621.541.477Bala marghab30.1630.6444.13104.39106.9973.7246.7637.1935.4435.7535.6133.7851.218Chichaktu0.460.631.441.730.920.510.310.280.280.380.390.490.65

Average of monthly and annual discharge selected stations (cubic meters per second)discharge study9

Physiography dischargeFloodSediment Water Quality Flood Design

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RowMethodRunoff Coefficient (%)Annual Volume (mcm)Average of Annual Discharge (m3/s)1Area- Volume Relation4.5821.250.6742P-Q-A Ratio of Target station55.3325.650.8133Justin49.2222.820.7244I.C.A.R44.8620.800.660

Results of Different Methods of Calculating The Annual Flow Volume11

Statistical parameters monthly and annual discharge at the dam site (cubic meters per second)YearJanFebMarAprMayJuneJulyAugSepOctNovDecAnnualMin0.250.350.800.960.510.290.170.160.150.210.220.270.36Average0.510.701.601.921.020.570.340.310.310.420.430.540.72Max1.141.563.604.312.301.280.770.700.690.950.981.221.63

Trend of variation monthly average discharge at the dam site12


Monthly and annual discharge at the Qadis Khordak dam site with different return periods (mcm)Return Period (year)251020501002005001000MonthJan1.351.771.992.182.382.522.642.772.90Feb1.682.212.482.712.963.133.293.453.61Mar4.295.636.326.907.557.988.388.789.19Apr4.986.527.338.008.759.259.7110.1810.65May2.743.604.044.414.835.105.365.625.88June1.481.942.182.372.602.752.883.023.16July0.921.201.351.471.611.701.791.871.96Aug0.841.101.241.351.481.561.641.721.80Sep0.801.051.181.281.401.481.561.631.71Oct1.141.491.681.832.002.112.222.332.44Nov1.131.481.661.811.982.092.202.302.41Dec1.461.912.142.342.562.712.842.983.12Annual22.8229.9233.6336.6940.1342.4344.5346.7048.86

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Extracted maximum daily flood data at the daily dischargeBabulai, Chichaktu, Bala murghab and Khush rabat Stations due to low statistical period were excluded from the calculations. Prolongation statistics daily maximum flood.Controlled the correctness of data using different methods.Flood frequency analysis of direct statistical method.Assessment of flood at the dam site using experimental methods and mathematical models Hec-HMS to calculate the maximum instantaneous flood with different return periods.Calculating the probable maximum flood (PMP) equivalent to 829 M3/s.Flood hydrograph analysis on dam site14


YearLuka-i-surkhBabulaiBala murghabChekhcheranLangarChichaktuKhush rabatTangi azu196215822.31.9196315532.45.36196426210815.6196526237.715.7196610940.46.68196732278.413.9196830651.77.061969337656081991919703.8682.411027.42.271.919711.3366.595.235.22.344.789.42197214.820422568201210.619734.9123227535.21.47512.219741.023097.410634.34.310.7101975151052405231488.868.822419763.6154.8258390100258.426.619775.3277.891.712926.79.2611.85.0819781.3813.812226223.47.882.15.08Count1051017178917Min1.0213.866.595.222.31.472.11.9Average8.456.3215.9252.862.89.97.311.2Max33105765608199251226.6

Maximum daily flood of hydrometric stations (m3 / s)15


Summary results of frequency analysis daily maximum flood in hydrometric stations m3/sReturn Period (year)StationLuka-i-SurkhChekhcheranLangarTangi Azu25.0821746.59.58511.435182.216.51017.445111621.12024.755615625.55036.770222531.110047.782029235.220060.694637439.250075106847543100099.4127064248.32000121142080252.250001541680107055.9100001821820132061

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Flood values of basin with different return periods based on the different methods m3/sMethodReturn Period (Year)1000050002000100050020010050201052Creager 473.6383.9287.8230.4170.4134.2104.880.756.041.629.516.7Fuller 447.7362.9272.0217.8161.1126.999.076.352.939.327.915.8Franko- Roudieh197.6146.597.170.846.132.823.015.99.46.23.81.7model422.8374.3312.8268.4226.2173.9137.5104.365.841.422.09.9

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Flood hydrograph at the Qadis Khordak dam site with different return periods18


Hydrological stations of the region lacked a sufficient number of samples of sediment on the other hand, they are much more drainage area of the basin studies.To estimate the sediment load at the dam site, was used the experimental EPM method.According to this method, the volume of sediment per year and 50-year-old dam site respectively 0.035 and 1.72 million cubic meters.

Determine total sedimentary load basin studies on the EPM methodArea (km2)Erosion Intensityspecial Erosion (m3/km2/year)specific sediment (m3/km2/year)specific sediment with 35% bed load (m3/km2/year)Total sediment (million m3/year)1350.37216.2189.32560.035

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ParameterUnitResultQader Abad-before damdam axisBefore damafter damPhysical testPH-7.97.87.87.9TDSmg/l405406408384TurbidityNTU1.431.521.471.36Chemical test Chloridemg/l26252722Total Hardness mg/l260268264251Total ironmg/l0.030.040.030.04Sodiummg/l0.5Nitratemg/l00.90.81.1Residual chlorinemg/l110000Sulfatemg/l0.19113117101Coppermg/l0.410.180.170.18Zincmg/l260.380.440.42

Summary analysis of water quality Water quality

Using the results of water quality analysis performed by the consultant in 4 cases, Chemical quality of drinking water (based Schoeller diagram) is acceptable and for agricultur(according to the Wilcox diagram) is good.20


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Thank you for your attention

Physiography dischargeFloodSediment Water Quality Flood Design

hydrology 1

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