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ejercicios 02

Irrigaciones

BRIHAM
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ejercicios 02

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  1. (2).Desarrollo de problemas aplicados. • Un canal rectangular debe mover 1.2 m3/s con una pendiente de 0.009, si n=0.011. ¿Cuál es el área hidraulica en m2, del canal? Caudal Q=1.2m3/s Pendiente S = 0.009 Coef. Rugosidad n=0.011 Área hidráulica = ?

  2. - Tipos de sección hidráulica del canal. Rectangular Trapezoidal Triangular Circular Parabólica

  3. SOLUCION: ➢ Hallamos el Área hidráulica:: ? = ?? ???? ??????? ?? ?? ?????? ?????????? ℎ????????? ??? ? = 2? ? = 2?(?) ? = 2?2 ➢ Hallamos el perímetro mojado: ??= ? + 2? ??= 2? + 2? ??= 4? ➢ Calculamos el radio hidráulico: ? =2?2 4? ? =? 2

  4. Aplicando la fórmula de manning calculamos el caudal: ? =1 2 3(?) 1 2 ?(?)(?) 0.011(2?2)(? 1 2 3(0.009) 1 2 ? = 2) 0.011(2?2)(? 1 2 3(0.009) 1 2 1.2 = 2) 1.2(0.011) = (2?2)(? 2 3 2) 1 2 (0.009) 2 3= (2?2)(?) 2 3 0.139(2) 0.221 2 8 3 = ? (0.221 8 )3 ? = 2 ? = 0.4377 ?

  5. Ya obtenido el valor del tirante hidráulico podemos obtener el valor del ancho de la solera de la máxima eficiencia hidráulica: ? = ? ?.???? ? = ?.???? ? Ahora podemos calcular el área hidráulica: ? = ?? ? = ?.???? ? ?.???? ? ? = ?.???? ?? Calculamos el perímetro mojado: ??= ?.???? + ? ?.???? → ??= ?.???? ?

  6. SOLUCION: usando programa-Hcanales

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