【摘要】 以汾河上游(兰村以上)为研究区,探究土地利用变化对汾河流域径流的影响。利用1956-2011年的水文气象资料,结合研究区3期遥感影像(1978、1998和2010年),分析了汾河上游多年径流变化趋势以及下垫面变化特征。结果表明,汾河上游径流量呈现下降趋势,1956-2011年兰村站的年平均径流量减少量为0.019亿m3,多年平均径流量没有发生突变。汾河上游土地利用类型变化明显,林草地面积呈增加趋势,农用地与水域面积呈减少趋势。以上研究结果表明,合理规划土地利用,对流域安全具有重要意义。更多还原

【Abstract】 This study is to explore the influence of land use change on runoffs in the Fenhe River Basin.Based on the hydrological and meteorological data of 1956-2012,based on the 3-phase remote sensing images( 1978,1998 and 2010),the trend and the change of the underlying surface of the Fenhe River are analyzed.The results show that the runoff of Fenhe River shows a downward trend,and the average annual runoff volume of Lancun Station in 1956-2011 was 0.019 billion m3,and the average annual runoff did not change.Its upstream land use type has changed obviously,the forest land area has increased,agricultural land and water area shows a decreasing trend.The above results show that the rational planning of land use is of great significance to watershed security.更多还原