内蒙古黄土丘陵区坡面径流及其影响因素研究

Researches of the Effects of Influence Factors on Surface Flow in Hilly and Gully Region of the Loess Plateau

为了进一步探讨坡面径流和各影响因子间的关系,以内蒙古的宁城、和林和东胜三地区的64个径流小区为研究对象,通过三年的定位观测,分析比较了各因子对坡面径流的影响,研究结果表明:在黄土丘陵区,坡面径流主要受降雨、植被以及人为等因素的影响。降雨量和降雨强度与径流量成正相关关系;林分密度,林冠的冠幅与径流量为负相关关系;人为因素主要表现在农业措施方面,不同的措施引发不同的径流状况,良好的措施可减小径流,破坏行为加深径流,造成水土流失。

In order to probe into the relationship between runoff and influencing factors ,according to fixed-position observation data of three years from 64 runoff plots in three areas of Ningcheng, Helin and Dongsheng in Inner Mongolia, the impact of rainfall,vegetation cover and agricultural measure on runoff is studied. The result can offer the guidance and support of the theory for hilly region of the Loess Platean in Inner Mongolia. Meanwhile the results indicate that the relationship between runoff and rainfall and rainfall intensity is positive correlation. But runoff decreases with the increase of vegetation cover and canopy. The agricultural measure plays an important rule in the impacts on runoff. Planting with high quality can reduce the runoff. Destruction of planting strengthens the runoff and increases soil erosion and water loss.