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排水沟的布设原则
排水沟的布设原则
Layout principle of drainage ditch
1 排水沟一般布设在坡面截水沟的两端或较低一端，用以排除截水沟不能容纳的地表径流。排水沟的终端连接蓄水池或天然排水道 。
1 drainage ditches are generally located at the ends or lower ends of the trench trench, so as to exclude the surface runoff that the trench can not accommodate. The end of the drain is connected to the reservoir or natural drainage.
2 排水沟在坡面上的比降，根据其排水去处（蓄水池或天然排水道）的位置而定，当排水出口的位置在坡脚时，排水沟大致与坡面等高线正交布设；当排水去处的位置在坡面时，排水沟可基本沿等高线或与等高线斜交布设。各种布设都必须 作好防冲措施（铺草皮或石方衬砌） 。
2 the ratio drop of the drainage ditch on the slope, according to the location of the drainage area (reservoir or natural drainage), when the position of the drainage outlet is at the foot of the slope, the drainage ditch is roughly arranged with the contour line of the slope; when the location of the drainage area is on the slope, the drain can be basically slanted along the contour line or with the contour line. All kinds of layout must be well protected against erosion.
3梯田区两端的排水沟，一般与坡面等高线正交布设，大致与梯田两端的道路同向。一般土质排水沟应分段设置跌水。排水沟纵断面可采取与梯田区大断面一致，以每台田面宽为一水平段，以每台田坎高为一跌水，在跌水处做好防冲措施（铺草皮或石方衬砌） 。
The drains at the 3 ends of the terraced fields are generally laid out on the same side with the contour lines of the slopes, roughly the same as the roads at both ends of the terrace. Water drop should be set up in the general soil drains. The longitudinal section of the drainage ditch can be consistent with the large section of the terrace area, with the width of each field as a horizontal section, and a drop of water at the height of each field.
Layout principle of drainage ditch
1 排水沟一般布设在坡面截水沟的两端或较低一端，用以排除截水沟不能容纳的地表径流。排水沟的终端连接蓄水池或天然排水道 。
1 drainage ditches are generally located at the ends or lower ends of the trench trench, so as to exclude the surface runoff that the trench can not accommodate. The end of the drain is connected to the reservoir or natural drainage.
2 排水沟在坡面上的比降，根据其排水去处（蓄水池或天然排水道）的位置而定，当排水出口的位置在坡脚时，排水沟大致与坡面等高线正交布设；当排水去处的位置在坡面时，排水沟可基本沿等高线或与等高线斜交布设。各种布设都必须 作好防冲措施（铺草皮或石方衬砌） 。
2 the ratio drop of the drainage ditch on the slope, according to the location of the drainage area (reservoir or natural drainage), when the position of the drainage outlet is at the foot of the slope, the drainage ditch is roughly arranged with the contour line of the slope; when the location of the drainage area is on the slope, the drain can be basically slanted along the contour line or with the contour line. All kinds of layout must be well protected against erosion.
3梯田区两端的排水沟，一般与坡面等高线正交布设，大致与梯田两端的道路同向。一般土质排水沟应分段设置跌水。排水沟纵断面可采取与梯田区大断面一致，以每台田面宽为一水平段，以每台田坎高为一跌水，在跌水处做好防冲措施（铺草皮或石方衬砌） 。
The drains at the 3 ends of the terraced fields are generally laid out on the same side with the contour lines of the slopes, roughly the same as the roads at both ends of the terrace. Water drop should be set up in the general soil drains. The longitudinal section of the drainage ditch can be consistent with the large section of the terrace area, with the width of each field as a horizontal section, and a drop of water at the height of each field.
