祁连山排露沟流域土壤水热与降雨脉动沿海拔梯度变化
发布时间：2018-12-28 10:06
【摘要】：为了探讨垂直带气候与植被垂直分布间关系,对祁连山排露沟流域北坡不同海拔梯度降雨和土壤水热观测数据进行了分析,结果表明:1生长季降雨量随着海拔升高而增加,增加幅度为27.7 mm·(100m)~(-1);2海拔越高降雨天数占生长季比值越高,2~10 mm的小降雨脉动频率随着海拔升高而增加,小于2 mm的降雨脉动在低海拔发生频率较高,大于20 mm的降雨脉动在高海拔发生频率较高;3在表层0~10 cm和10~20 cm的土壤湿度每升高100 m增加幅度分别为0.027 m~3·m~(-3)和0.023 m~3·m~(-3),在表层0~10 cm和10~20 cm的土壤温度每升高100 m降低幅度分别为0.32℃和0.28℃;4不同海拔上的土壤温度沿土壤剖面降低,土壤湿度随土壤深度先升高后降低,而土壤温湿度随生长季先升高后降低。
[Abstract]:In order to study the relationship between climate and vertical distribution of vegetation in the vertical zone, the rainfall and soil hydrothermal data at different elevations on the northern slope of Pailugou basin in Qilian Mountains were analyzed. The results showed that: 1 the rainfall in growing season increased with the increase of altitude. The increase was 27.7 mm (100m) ~ (-1); (2) the higher the altitude, the higher the ratio of rainfall days to growing season. The frequency of small rainfall pulsation increased with the elevation of 2 ~ 10 mm, and the frequency of rainfall pulsation of less than 2 mm was higher at low altitude. The frequency of rainfall pulsation over 20 mm is higher at high altitude. (3) the increase of soil moisture for 10 cm and 10 ~ 20 cm in the surface layer was 0.027 mc3m-3 and 0.023 mc3m-3, respectively, when the soil moisture was increased by 100m, and the soil moisture increased by 0.027 mc3m-3 and 0.023 mc3m-3, respectively. The soil temperature decreased by 0. 32 鈩，
本文编号：2393816
[Abstract]:In order to study the relationship between climate and vertical distribution of vegetation in the vertical zone, the rainfall and soil hydrothermal data at different elevations on the northern slope of Pailugou basin in Qilian Mountains were analyzed. The results showed that: 1 the rainfall in growing season increased with the increase of altitude. The increase was 27.7 mm (100m) ~ (-1); (2) the higher the altitude, the higher the ratio of rainfall days to growing season. The frequency of small rainfall pulsation increased with the elevation of 2 ~ 10 mm, and the frequency of rainfall pulsation of less than 2 mm was higher at low altitude. The frequency of rainfall pulsation over 20 mm is higher at high altitude. (3) the increase of soil moisture for 10 cm and 10 ~ 20 cm in the surface layer was 0.027 mc3m-3 and 0.023 mc3m-3, respectively, when the soil moisture was increased by 100m, and the soil moisture increased by 0.027 mc3m-3 and 0.023 mc3m-3, respectively. The soil temperature decreased by 0. 32 鈩，
本文编号：2393816
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