人民长江
人民長江
인민장강
Yangtze River
2015年
22期
13-16,24
,共5页
巨莉%安邦%龙翼%严东春%史忠林
巨莉%安邦%龍翼%嚴東春%史忠林
거리%안방%룡익%엄동춘%사충림
137Cs示踪%侵蚀产沙%土地利用变化%三峡库区
137Cs示蹤%侵蝕產沙%土地利用變化%三峽庫區
137Cs시종%침식산사%토지이용변화%삼협고구
137 Cs tracing%Three Gorges Reservoir region%sediment yield%land use change
小流域是三峡库区入库泥沙的策源地，研究其侵蚀产沙状况对正确预测三峡水库来沙变化趋势非常重要。以三峡库区典型农业小流域———斑竹林小流域为研究对象，通过137 Cs示踪技术，研究了土地利用变化对流域侵蚀产沙空间分布的影响。结果表明：旱地退耕的其他林地和水田改的旱地的侵蚀堆积情况与土地利用变化前相差不大；在土地利用变化后的短期内，该流域侵蚀产沙变化较小，旱地是流域主要的侵蚀产沙源地，水田是淤积区。
小流域是三峽庫區入庫泥沙的策源地，研究其侵蝕產沙狀況對正確預測三峽水庫來沙變化趨勢非常重要。以三峽庫區典型農業小流域———斑竹林小流域為研究對象，通過137 Cs示蹤技術，研究瞭土地利用變化對流域侵蝕產沙空間分佈的影響。結果錶明：旱地退耕的其他林地和水田改的旱地的侵蝕堆積情況與土地利用變化前相差不大；在土地利用變化後的短期內，該流域侵蝕產沙變化較小，旱地是流域主要的侵蝕產沙源地，水田是淤積區。
소류역시삼협고구입고니사적책원지，연구기침식산사상황대정학예측삼협수고래사변화추세비상중요。이삼협고구전형농업소류역———반죽림소류역위연구대상，통과137 Cs시종기술，연구료토지이용변화대류역침식산사공간분포적영향。결과표명：한지퇴경적기타임지화수전개적한지적침식퇴적정황여토지이용변화전상차불대；재토지이용변화후적단기내，해류역침식산사변화교소，한지시류역주요적침식산사원지，수전시어적구。
The small watersheds are the primary source of incoming sediment for the Three Gorges Reservoir region, so the study on erosion and sediment yield of small watersheds is important to the accurate forecast of incoming sediment variation of Three Gorges Reservoir. A small and typical agricultural catchment ( Banzhulin Catchment) was selected, the influence of land use change on the spatial distribution of sediment yield was researched by using 137 Cs tracing method. The results indicated that the soil erosion situation of the forestland and dry land transformed from paddy field changed little. The variation of soil erosion and sediment yield is small in short period after the land use change. The dry land is the main source of sediment yield and the paddy field is the sedimentation area.
