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Equações obtidas a partir das leis de conservação para dimensionamento de drenos subterrâneos
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The uniformity of water distribution under low-pressure moving irrigation systems
No full textA center pivot and linear move sprinkler irrigation system are modified to work with low-pressures. Furrow drops which deliver water directly to the furrow and spray heads, which spray the water at approximately 1.20 m above the ground are both tested. Earthen checks are used in the furrow (furrow checks) to retain the water because application rates exceed the infiltration rate of the soil. The stop-and-go movement of the system causes non-uniform water distribution along the furrow. This non-uniformity is investigated in the field and with a computer model. Results indicate that this non-uniformity depends on the furrow check spacing and the length of the system, but not on the system speed. The uniformity perpendicular to the furrows (along the main supply line of the system) is very good. The irrigation efficiency and the yield are high while substantial water and energy savings can be obtained.hydrology collectio
