The influence of initial soil conditions on water penetration and soil moisture distribution 荒漠地區(qū)土壤初始狀況對水平入滲的影響
The wetting front moved nearly parallel to the soil surface , and its length could be described by a power function of time , when the distribution of initial soil water was uniform 當初始含水量分布均勻時,降雨入滲過程中濕潤鋒面幾乎平行坡面運移,濕潤鋒深度與時間的關(guān)系可用冪函數(shù)描述。
By the experiments , some main factors influenced watering effect were analyzed . the results show that watering volume , initial soil water content , and width of water ditch influenced the watering effect differently 對影響灌水效果的幾個主要因素進行了分析,實驗表明,灌水量、土壤初始含水率、灌水溝寬度對灌水效果都有不同程度的影響。
The results indicated that even if there was different at initial soil condition , such as initial moisture content and initial salt content , salt content in soil profile and sar at top soil increased greatly after the high salinity water infiltrated 結(jié)果表明盡管土壤初始條件存在差異,但灌高礦化度水后,土壤含鹽量和溶液濃度總體增加,且土壤剖面特別是表層的sar明顯增大。
The results showed that the lower initial soil moisture content was , the less infiltration occurred and wetting front moved slowly , and soil salt were leached more efficiently . at the same time , salt reduced in the top soil and salt accumulated at the wetting front 通過對土壤初始含水量下土壤水鹽運移規(guī)律室內(nèi)模擬試驗研究,發(fā)現(xiàn)隨著土壤初始含水量的增加,相同入滲歷時內(nèi)的累積入滲量和濕潤鋒都在增加。