桂林理工大学学报
桂林理工大學學報
계림리공대학학보
JOURNAL OF GUILIN UNIVERSITY OF TECHNOLOGY
2015年
1期
53-59
,共7页
黄丹%郭纯青%习丽丽%徐宁涛
黃丹%郭純青%習麗麗%徐寧濤
황단%곽순청%습려려%서저도
旱涝%降雨量%径流量%拐点%漓江流域
旱澇%降雨量%徑流量%枴點%巑江流域
한로%강우량%경류량%괴점%리강류역
drought and flood%rainfall amount%discharge%turning point%Lijiang river basin
漓江汛期和枯水期有明显的周期性，通过大量数据对漓江降雨量、植被变化和生态需水量与漓江径流量间的关系进行了分析。在相关图中出现了大量的拐点，其中漓江月平均流量与降雨量拐点重合，说明漓江是一条雨源性河流；分析了漓江年平均流量、最小流量及最枯月平均流量的拐点，其径流变异的主要因素除降水突变等气候变化，人类活动对漓江径流序列的突变影响也比较大。植被覆盖率倒U型拐点的出现，说明近些年植被破坏严重也是漓江旱涝的一个主要原因；生态需水量拐点出现的时间和月平均流量的时间基本一致，说明月平均流量对生态需水量的影响远远大于河流径流量的年际波动的影响。通过分析印证了漓江旱涝出现与降雨和径流的分布不均、补给区植被覆盖率、流域生态需水量的增加有关。
巑江汛期和枯水期有明顯的週期性，通過大量數據對巑江降雨量、植被變化和生態需水量與巑江徑流量間的關繫進行瞭分析。在相關圖中齣現瞭大量的枴點，其中巑江月平均流量與降雨量枴點重閤，說明巑江是一條雨源性河流；分析瞭巑江年平均流量、最小流量及最枯月平均流量的枴點，其徑流變異的主要因素除降水突變等氣候變化，人類活動對巑江徑流序列的突變影響也比較大。植被覆蓋率倒U型枴點的齣現，說明近些年植被破壞嚴重也是巑江旱澇的一箇主要原因；生態需水量枴點齣現的時間和月平均流量的時間基本一緻，說明月平均流量對生態需水量的影響遠遠大于河流徑流量的年際波動的影響。通過分析印證瞭巑江旱澇齣現與降雨和徑流的分佈不均、補給區植被覆蓋率、流域生態需水量的增加有關。
리강신기화고수기유명현적주기성，통과대량수거대리강강우량、식피변화화생태수수량여리강경류량간적관계진행료분석。재상관도중출현료대량적괴점，기중리강월평균류량여강우량괴점중합，설명리강시일조우원성하류；분석료리강년평균류량、최소류량급최고월평균류량적괴점，기경류변이적주요인소제강수돌변등기후변화，인류활동대리강경류서렬적돌변영향야비교대。식피복개솔도U형괴점적출현，설명근사년식피파배엄중야시리강한로적일개주요원인；생태수수량괴점출현적시간화월평균류량적시간기본일치，설명월평균류량대생태수수량적영향원원대우하류경류량적년제파동적영향。통과분석인증료리강한로출현여강우화경류적분포불균、보급구식피복개솔、류역생태수수량적증가유관。
The flood and drought period of Lijiang river shows obvious periodicity.The analysis covers the rela-tionship between the Lijiang rainfall capacity,vegetation change,ecological water demand and the runoff vol-ume through mass data.There are many turning points in the related figures.The turning points of the average flow rate and the rainfall capacity coincide with each other in Lijiang which indicate that the source of the Li-jiang river is from the rain.Besides,the turning points of the average annual flow,minimum flow and maxi-mum average flow rate in the drainage basin are analyzed.Other than the runoff change climate like sudden rainfall change,human activity affects the runoff sequence change.The occurrence of reversal U-form turning point of the vegetation coverage presents that the serious vegetation deterioration in recent years is the main cause for the drought and flood.The occurrence time of the ecological water demand turning point is basically the same as the time of the average monthly flow,which shows that the influence of the average monthly flow on the ecological water demand is much greater than the influence of the inter-annual fluctuation of the river runoff. Through the analysis,it turns out that the drought and flood related to the uneven distribution of the rainfall and runoff increases the vegetation coverage in the recharge area and basin ecological water demand.
