CAJ | 학술논문

20世纪70年代以来，黄河上中游绝大部分支流来沙明显减少，但泾河流域黄土高塬沟壑区的核心地区无明显减沙趋势。以地处董志塬核心区的南小河沟和砚瓦川流域为例，分析了水土流失治理前后的降雨-产沙关系，以及塬面、坡面和沟谷的产水产沙量，结果表明：塬面径流集中下沟是流域产沙的主要驱动力，尤以庄院和道路径流集中下沟为甚；在塬面面积占流域面积60％以上的完整高塬区，梯田和林草措施的减沙潜力很难超过10％；尽可能减少集中下沟的塬面径流量是遏制该区侵蚀产沙的关键。
20세기70년대이래，황하상중유절대부분지류래사명현감소，단경하류역황토고원구학구적핵심지구무명현감사추세。이지처동지원핵심구적남소하구화연와천류역위례，분석료수토류실치리전후적강우-산사관계，이급원면、파면화구곡적산수산사량，결과표명：원면경류집중하구시류역산사적주요구동력，우이장원화도로경류집중하구위심；재원면면적점류역면적60％이상적완정고원구，제전화림초조시적감사잠력흔난초과10％；진가능감소집중하구적원면경류량시알제해구침식산사적관건。
The sediment reduction trend in the core gully plateau region of Loess Plateau which located in the Jinghe River is still inconspicuous, while the sediment yield of most tributaries in the upper and middle reaches of the Yellow River reduced significantly since 1970s. This phenome-non is related to the special sediment production mechanism of the gullied rolling loess area. This study shows that:the runoff intensively run along tableland to valley is the major driving force for sediment production,especially the runoff running along the courtyard and road in the tableland to valley;the potential sediment reduction of terraces,tree and grass vegetation are hardly over 10% in the regions that tableland area accounted for more than 60% of the whole plateau region;reducing the runoff running along tableland to valley as much as possible is the key factor to control e-rosion and sediment yield.