發(fā)布時間：2018-04-24 11:52

  本文選題：降水 + 土壤水��； 參考：《水土保持學(xué)報》2017年03期

【摘要】：通過野外調(diào)查與室內(nèi)試驗相結(jié)合的方法,對王茂溝流域降水及5種土地利用類型土壤剖面穩(wěn)定氫氧同位素特征進行對比分析,為黃土區(qū)土壤水分運移機制、模型參數(shù)識別及生態(tài)保護與重建提供科學(xué)依據(jù)。結(jié)果表明:(1)降水與5種土地利用方式下土壤水中δD和δ~(18) O的變化范圍分別為(-118.08‰)~(-14.37‰),(-16.13‰)~(1.41‰)和(-92.36‰)~(-34.98‰),(-12.48‰)~(-5.01‰),平均值分別為-37.36‰,-5.65‰和-60.18‰,-7.81‰。(2)不同土地利用類型的土壤水氫氧同位素變化存在顯著性差異,土壤通透性草地梯田林地壩地坡耕地,表層土壤水分的蒸發(fā)分餾程度梯田草地壩地坡耕地林地。(3)林地和草地"優(yōu)先流"現(xiàn)象明顯,草地"優(yōu)先流"程度最大,林地能顯著延伸"優(yōu)先流"發(fā)生路徑。(4)草地、林地和梯田分別在160,200,200cm土層及以下氫氧同位素值相對穩(wěn)定,壩地和坡耕地可能對地下水水質(zhì)與補給造成較大影響。
[Abstract]:By means of field investigation and laboratory test, the stable hydrogen and oxygen isotopic characteristics of precipitation and soil profiles of five types of land use in Wang Mao Valley were compared and analyzed, which was the mechanism of soil water migration in loess area. The model parameter identification and ecological protection and reconstruction provide scientific basis. The results show that the variation range of 未 D and 未 ~ (18) O in soil water under different land use patterns are -118.08 鈥，

本文編號：1796511