CURVA I-D-F

CALCULO DE INTENSIDAD MAXIMA

I. METODO IILA SENAMHI - UNI:A. PARAMETROS CONSTANTES:ITEMVALORUNIDCONSTANTE REGIONALa =12.10Adim.CONSTANTE REGIONALb =0.400hr.CONSTANTE REGIONALc =0.242Adim.CONSTANTE ESTADISTICAk =0.553Adim.

B. CALCULOS CONSECUTIVOS:TIEMPO DE DURACION (hr)T =SEGNhr.TIEMPO DE RETORNO (Aos)TR =SEGNAosINTENSIDAD PARA T y TRi =PROC.mm/hr

C. INTENSIDAD PARA DIFERENTES T Y TR:

INTENSIDADES MAXIMAS PARA DIFERENTES PERIODOS DE RETORNOTTRTRTRTRTTRTRTRTR(min)251015(min)2510151021.70925.80428.90230.715100.0460.0390.0350.0332017.85521.22323.77225.262200.0560.0470.0420.0403015.28818.17220.35421.630300.0650.0550.0490.0464013.44015.97617.89419.016400.0740.0630.0560.0535012.04014.31116.02917.035500.0830.0700.0620.0596010.93713.00014.56115.474600.0910.0770.0690.0657010.04311.93813.37114.209700.1000.0840.0750.070809.30211.05712.38513.161800.1080.0900.0810.076908.67710.31411.55212.276900.1150.0970.0870.0811008.1419.67710.83911.5181000.1230.1030.0920.0871107.6769.12410.22010.8611100.1300.1100.0980.0921207.2698.6409.67710.2841200.1380.1160.1030.0971306.9088.2119.1979.7741300.1450.1220.1090.1021406.5867.8298.7699.3191400.1520.1280.1140.1071506.2977.4858.3848.9101500.1590.1340.1190.1121606.0367.1758.0368.5401600.1660.1390.1240.1171705.7996.8937.7208.2051700.1720.1450.1300.1221805.5826.6357.4327.8981800.1790.1510.1350.1271905.3836.3997.1677.6161900.1860.1560.1400.1312005.2006.1816.9237.3572000.1920.1620.1440.1362105.0315.9806.6987.1182100.1990.1670.1490.1402204.8745.7936.4896.8962200.2050.1730.1540.1452304.7285.6196.2946.6892300.2120.1780.1590.1502404.5915.4576.1136.4962400.2180.1830.1640.1542504.4645.3065.9436.3152500.2240.1880.1680.1582604.3445.1635.7836.1462600.2300.1940.1730.1632704.2315.0305.6345.9872700.2360.1990.1780.1672804.1264.9045.4935.8372800.2420.2040.1820.1712904.0264.7855.3595.6962900.2480.2090.1870.1763003.9314.6735.2345.5623000.2540.2140.1910.180a1=0.048970.041200.036780.03461b1=0.000710.000590.000530.00050a=1417.71481685.17441887.49972005.8525b=69.4311969.4311969.4311969.43119TTRTRTRTR(min)2 aos5 aos10 aos15 aos1017.8521.2223.7625.252015.8518.8421.1122.433014.2616.9518.9820.174012.9615.4017.2518.335011.8714.1115.8016.806010.9513.0214.5815.507010.1712.0913.5414.39809.4911.2812.6313.42908.8910.5711.8412.581008.379.9511.1411.841107.909.3910.5211.181207.488.909.9610.591307.118.459.4610.061406.778.059.019.581506.467.688.609.141606.187.358.238.741705.927.047.888.381805.686.767.578.041905.466.507.287.732005.266.257.017.442105.076.036.757.182204.905.826.526.932304.735.636.306.702404.585.456.106.482504.445.285.916.282604.305.125.736.092704.184.965.565.912804.064.825.405.742903.944.695.255.583003.844.565.115.43

GRAFICO CURVAS I.D.F.

CALCULOSDISEO DE ZANJAS DE INFILTRACIONCAPACIDAD DE ALMACENAMIENTO Y DIMENSIONES DE ZANJA DE INFILTRACIONDonde:V = Capacidad de almacenamiento (litros/metro lineal)C = Coeficiente de escorrentia (TABLA N 1.0) adimencionale = Espaciamiento entre zanjas de infiltracin (TABLA N 2.0) en (metros)Imax = Intensidad mxima (cm/24 horas) (CURVA I-D-F-AYACUCHO)10 = factor de ajuste de unidades1. DATOS PROPUESTOS SEGN ANALISIS DE LA CUENCATerreno de pastizales, pendiente ondulado y suelo de textura finaTiempo de concentracion: Tc = 220 minutosTiempo de retorno 7.5 aos para lluvia mximaLa zona tiene una precipitacin mayor a 1200 mm/ao2.CALCULO DEL COEFICIENTE DE ESCORRENTIA

TABLA N 1.0

TOPOGRAFIATEXTURA DEL SUELOVEGETACIONGruesaMediaFinaBOSQUE:Plano (0 - 5 % Pendiente)0.100.300.40Ondulado (5 - 10 % Pendiente)0.250.350.50Escarpado (10 - 40 % Pendiente)0.320.430.63PASTIZALES:Plano (0 - 5 % Pendiente)0.100.300.40Ondulado (5 - 10 % Pendiente)0.160.360.55Escarpado (10 - 40 % Pendiente)0.230.430.63TERRENO CULTIVADOS:Plano (0 - 5 % Pendiente)0.350.550.65Ondulado (5 - 10 % Pendiente)0.450.650.75Escarpado (10 - 40 % Pendiente)0.570.770.87

Pendiente del terrenoS =10%Coeficiente de escorrentiaC =0.55AdimTiempo de concentracion Tc =220min3. CALCULO DEL ESPACIAMIENTO "e" ENTRE TERRAZAS

TABLA N 2.0

PENDIENTEALTURA DE LA PRECIPITACION ANUAL< 1200 mm> 1200 mm< 1200 mm> 1200 mm%INTERVALO VERTICAL (IV)INTERVALO HORIZONTAL (IH)20.810.7640.5038.0041.020.9125.5022.7561.221.0720.3317.8381.421.2217.7515.25101.621.3716.2013.70121.831.5215.2512.66142.031.6814.5012.00162.241.8314.0011.43182.441.9813.5511.00202.642.1313.2010.65222.842.2812.9010.36243.052.4412.7010.16263.252.5912.509.96283.452.7412.329.78303.662.9012.209.67323.863.0512.039.53344.063.2011.949.41364.273.3511.869.30384.473.5011.769.21404.673.6611.679.15505.694.4211.388.84Espaciamiento entre zanjase =13.70m

4. CALCULO DE LA INTENSIDAD MAXIMA

Tiempo de concentracin Tc =220.00minPeriodo de retornoTR =7.50aosEn el siguiente grfico con el tiempo de concentracion y periodo de retorno se tiene:interpolando:Intensidad mxima en (mm/hr)Imax =6.30mm/hrIntensidad mxima en (cm/24 hr)Imax =15.12cm/24hrPgina3CURVA I -D -F - AYACUCHO5. CALCULO DE LA CAPACIDAD DE ALMACENAMIENTODATOS:Coeficiente de escorrentaC =0.55AdimEspaciamiento entre zanjase =13.70mIntensidad mxima en (cm/24 hr)Imax =15.12cm/24hrCapacidad de almacenamientoV =1139.292lt/ml

DIMENSIONPgina46. CALCULO DE LAS DIMENSIONES DE LA ZANJA (cuadro N 3.0)CUADRO N 3.0PENDIENTEHBH2Y2V%(cm)(cm)(cm)(cm)(lt/ml4080366014139040601428100446014439045601789545100506018051104770182210056602208501105270222712057702245803660765409040607801004460795904560969104510043709851104770100210056601196501105270121412057701232valores calculados904560695451004370712Y2 = Longitud de corte (cm)1104770700H2 = profundidad de corte (cm)1005660858H = Altura de relleno (cm)15501105270877B = Longitud de relleno (cm)120577089511058701039V = Almacenam1139.3lt/ml5512063701059S = pend.=10%13068701079904560559interpolando:1139.3lt/ml4510050605751104770592interpolacin:1005660690valor =70100220501105270708clculo =x=631139.31205770726valor =6011961105870834551206370855entonces:1306870875H =49cm1005660521B =103cm501105270539H2 =54cm1205770557Y2 =63cm110587063030551206370650130687067160120697075013065807721005670436501105270455120577047311058705284055120637054813068705686012069706281306580650