【摘要】 于2002年8月~2003年7月对四川西部理县干旱河谷区土壤水分状况进行了定位研究。结果表明:在理县干旱河谷区,不同海拔高度0~50 cm土层土壤平均含水量总的变化趋势是阴坡比阳坡高,而土壤水分空间异质性阳坡比阴坡大。同一坡向不同海拔的土壤含水量变化为2 050 m处的最高,1 850 m处的次之,1 450 m处再次之,1 650 m处最少,表明了在干旱区河谷的两岸坡面上部土壤水分状况最好,在坡面下部靠近河流处次之,中下坡水分条件最差。相同海拔高度,不同坡向土壤含水量都表现为随着土层深度的增加土壤含水量增加的趋势,且30~50 cm土层的土壤含水量最高。更多还原

【Abstract】 In this paper,researches were made on soil water conditions in arid river valley,Lixian,Sichuan from August 2002 to July 2003.The results showed that average soil water content at 0~50cm depth at northern slope for different altitudes was higher than that at southern slope,while the reverse was for spatial heterogeneity of soil water.For the same slope aspect,the order of soil water contents in terms of altitudes was 2050m>1850m>(1450m)>1650 m.For the same altitude,soil water contents at different slope aspects all increased with increasing soil depth and the highest soil water content occurred at the depth of 30~50cm.更多还原