西北村镇集雨下垫面选择的试验研究

Experimental Research on the Selection of Rainwater Harvesting Underlying Surface in Northwest Towns and Villages

采用设定的雨强、雨质作为试验条件,开展对4种下垫面情况下的模拟降雨实验.测定CODMn、氨氮、总磷、浊度、UV254指标,得到试验结果如下:降雨径流污染物削减能力从小到大的下垫面为混凝土<红泥瓦<水泥土<粘土砖;同一降雨强度下,集流效率从高到低排列是混凝土>水泥土>红泥瓦>粘土砖.综合考虑集雨效率和对污染物的削减作用,水泥土较适合作为庭院式集流场的集雨材料.

Appropriateness,efficiency and high-quality collection of rainfall runoff are the first problem that must be solved in rainwater catchment drinking engineering of the Northwest territories. The rainfall simu- lation experiment is carried out on four underlying surface after the strength and quality of the rain are set. Then CODMn,ammonia,total phosphorus, turbidity and UV254 of these samples are tested. Results are as follows：to eliminate the pollutants by underlying surface, the order of the ability is concrete 〈red masonry 〈cement soil〈clay brick; to collect the rainfall runoff by underlying surface,the order of the ability is con- crete〉cement soil〉red masonry〉clay brick. If both ability to eliminate the pollutants and to collect the rainfall runoff are considered, cement soil is more suitable material for courtyard flow field to collect the rainfall runoff.