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li xin beng dai ti shui lun ji de jian yi ce liang he an zhuang
Author(s): 
Pages: 14-16
Year: Issue:  5
Journal: Farm Machinery

Keyword:  站址选择田平混凝土墩水泵并联止漏沟水并联使用编网捣固淹没深度;
Abstract: <正> 站址选择:水边人口比较集中,交通方便,山岩稳固的地方,坡度35°~55°,45°为最好。引水沟:尽量利用已有水沟进行修补或扩大,花钱少,见效快。如水源不足,可旱时灌田平时开车;水源太小,可以修个大水池白天蓄水晚上开车(我县东风公社大坪生产队就是这样干的,几年来效果很好)。新开水沟的坡度比为一千米下降一米,用曲尺吊线法测量(见图1,用经纬仪测更好)。每十米测一次,从上游住下游测,上下游用的曲尺不能互换,两个曲尺同拉线的间隙要一致,曲尺中心黑线要与吊线
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