Method for quantitatively controlling water leakage of seasonal water delivery open channel slope in cold region
A quantitative control and seasonal technology, applied to water supply devices, waterway systems, artificial waterways, etc., can solve problems such as increased loss along the way, waste of water resources, limited degree of channel operation safety, etc., and achieve the effect of improving operational stability
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[0033] Example 1
[0034] Based on the idea of "dynamic balance" of seepage water control, a comprehensive measure to control the seepage water of seasonal open channel slopes, including the following steps:
[0035] 1. For a specific project of a water conveyance open channel where vertical and horizontal drainage pipes have been installed, set up a number of water collecting wells on the outside of the canal embankment. Connect to horizontal drain.
[0036] Among them, the spacing of the catchment wells is determined based on the following formula:
[0037]
[0038] Among them, L is the spacing of the water collecting wells, D is the diameter of the longitudinal drainage pipe, i is the gradient of the longitudinal drainage pipe, k is the permeability coefficient, h is the buried depth of the longitudinal drainage pipe, H is the water depth of the channel, and n is the pipe roughness .
[0039] 2. A pump is installed at the connection between the water collection well...
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[0050] Example 2
[0051] Now relying on the main trunk canal of a long-distance water supply project in the northwest region, the specific example of the present invention will be further elaborated.
[0052] The project is located in the northern Xinjiang region. The length of the project along the line is more than 100km. The cross section is traditional trapezoid. The lining is manually laid with prefabricated hexagonal blocks. The “one cloth and one membrane” anti-seepage is laid under the lining, and the thickness of the mortar cushion under the membrane is 30cm. The channel is open to water in late April and shut off in early October every year. The vertical and horizontal drainage pipes of the channel are set up along the line. According to the method of the present invention, a batch of water collecting wells are arranged within 50m outside the horse road at the top of the canal. figure 1 shown. Both cut channels and fill channels are applicable.
[0053] Determin...
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