摘要
以黄土丘陵沟壑区第一副区韭园沟小流域为对象,探讨了1953年以来水土保持治理措施对流域泥沙输移比的影响。结果表明:该流域土壤侵蚀、泥沙输移和沉积与治理措施有着极为密切的相关性。在天然下垫面条件下,韭园沟小流域的泥沙输移比接近1.00。经过50多年来规模性水土流失治理,泥沙输移比下降到0.27。该流域的泥沙侵蚀量减少、沉积和输移比的改变,在水土保持措施达到一定程度时才逐步显现出来,小流域泥沙输移比变化的影响因素中,流域内人为沉积汇(淤积)的作用明显大于坡面水土保持措施的效果。因此,现行生态环境建设中,在注重坡面治理措施合理配置的基础上,更要加强小流域沟道泥沙拦截工程的建设。
Targeted at Jiuyuangou small watershed in the first sub region of gullied rolling loess area,the impact of different underlying surface measures on sediment delivery ratio since 1953 was analyzed.The outcomes show that the small watershed sediment erosion,transport and deposition of artificial control measures are extremely important.Under natural surface conditions sediment delivery ratio in Jiuyuangou small watershed is close to 1.0 for 50 years;through a gradual scale of artificial soil and water conservation,sediment transport decreases to 0.27.This study shows that the small watershed sediment erosion reduction in the deposition and the delivery ratio change,the first soil and water conservation measures to achieve a certain extent are gradually revealed,followed by small watershed sediment transport than the variables,the role of anthropogenic deposition sinks within the basin significantly greater than the effect of slope and soil conservation measures.Therefore,it is important not only to focus on the rational allocation of the slope control measures on the basis of the existing ecological environment construction,but also to strengthen the small watershed sediment interception works.
出处
《人民黄河》
CAS
北大核心
2013年第1期78-80,共3页
Yellow River
基金
水利部公益性行业科研专项(201201083)
关键词
土壤侵蚀
下垫面
泥沙输移比
韭园沟小流域
soil erosion
underlying surface
sediment delivery ratio
Jiuyuangou small watershed
