下凹式草坪耗水量试验研究

下凹式草坪不但具有草坪的功能还具有蓄渗雨水、防洪减峰和减污、减淤、增肥的优点。通过试验测试了下凹式草坪雨水利用以及节约灌溉水量方面的影响因素和效果。结果表明,在汇水面积比F/a=1、2、3下凹100mm的情况下,下凹式草坪实际利用雨水量比普通草坪分别增加27.16%、68.84%、89.72%,补充草坪根系层以下土壤水量分别增加271.78%、404.88%、605.99%,同时制定了下凹式草坪灌溉制度,计算平水年灌溉水量分别节约14.33%、35.53%、46.79%.试验研究结果为下凹式草坪的应用和推广提供了一定的参考。

Study on the Water Consumption of Sunken-lawn

Sunken-lawn not only has the functions of lawn but also has the advantage of storing and infiltrating the rainwater,cutting down flood flow and peak,decreasing pollution,reducing deposition and increasing fertilization.This paper studied the effects and influence factors of storing and infiltrating and water saving by field test.It is indicated that,under the condition of the lawn of 100 mm of hollow with different F/a =1,2,3 effective precipitation increased by 27.16%,68.84% and 89.72% than general lawn;quantity of replenishment to the soil increased by 271.78%,404.88% and 605.99%,respectively;the irrigation schedule was established and the results showed that sunken-lawn could save water by 14.33%、35.53%、46.79%,respectively,under the different ratio of service area to sunken-lawn area.The outcome of the study was intended to provide a reference for application and extent of sunken-lawn.