内蒙古荒漠草原降水有效性分析——基于苏尼特右旗过程降水量的监测

Abstract

Abstract: Climate change has become as one of the global issues in common concern. Water is one of the main limiting factors in semiarid grasslands. The change of precipitation pattern results in the change of soil moisture status. The effect of precipitation events on soil moisture content in desert steppe was studied based on the analysis of the daily precipitation data from May 2015 to December 2016 and the daily continuous observation data of soil moisture content at different depths (0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and 40-50 cm). The results showed that: ① The effect of precipitation on topsoil (0-10 cm and 10-20 cm) moisture content was the most significant, and there was a significant positive correlation between the soil moisture content of these two layers and precipitation. The response of soil moisture content of other three layers to precipitation events was not significant; ② The minimum volumes of effective precipitation to 0-10 cm and 10-20 cm soil layers were 6.4 mm and 8.33 mm respectively; ③ Inferred the minimum effective precipitation, it was found that the conversion rate of effective precipitation to soil moisture in 0-10 cm layer could be as high as 95%, but it was mostly about 70%; it could be as high as 90% in 10-20 cm soil layer, but it was mostly about 50%.

Key words: soil moisture content, effective precipitation, storm precipitation, Sonid Right Banner, Inner Mongolia

FANG Ting-ting, YAN Yong-zhi, LIU Qing-fu, ZHU Ling, HAN Fang, ZHANG Qing.

Precipitation Effectiveness in Desert Steppe in Inner Mongolia: Based on Monitoring of Storm Precipitation in Sonid Right Banner [J].Arid Zone Research, 2019, 36(3): 691-697.

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Precipitation Effectiveness in Desert Steppe in Inner Mongolia: Based on Monitoring of Storm Precipitation in Sonid Right Banner

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