摘要
分析比较秦岭南侧汉江和秦岭北侧渭河河流径流、泥沙含量变化表明 ,1935～ 1999年 6 5年间 ,渭河河流年均流量为 2 4 8.2 6m3 /s,汉江河流年均流量为 5 92 .94m3 /s,汉江年均流量是渭河的 2 .4倍。汉江河流年均含沙量为 0 .88kg/m3 ,渭河河流年均含沙量为 5 2 .0 3kg/m3 ,接近汉江河流的 6 0倍。渭河是一条多泥沙河流。分析 2 0世纪 80年代以后汉江、渭河河流径流泥沙含量表明 ,渭河河流年均流量为 195 .89m3 /s ,汉江河流年均流量为 5 85 .0 5m3 /s,均比 1935～ 1980年减少了 2 7.4 %和 1.9%,但汉江河流年均泥沙含量为 0 .4 1kg/m3 ,渭河河流年均泥沙含量却为 5 4 .5 8kg/m3 ,为汉江河流 133倍 ,比 1935～ 1980年增加了 90多倍。说明全球变化对秦岭山脉南北地质水文气候环境影响很大 ,秦岭南北两区在全球气候变化中表现出明显的区域响应性。
The span of Qinling Mountains affected the geograply and climate between the southern and northern areas to it. And under the influence of the global change, the Qinling Mountains has more affected the runoff and sediment between the southern and northern rivers. Based on long time observed data about the Hanjiang River and the Weihe River from 1935 to 1999, the change of runoff and sediment were analyzed. The result showed that the annual average runoff of the Hanjiang River and the Weihe River were 592.94 m 3/s and 248.26 m 3/s respectively from 1935 to 1999, the former was 2.4 times to the latter, but the annual average sediment of the Hanjiang River and the Weihe River were 0.88 kg/m 3 and 52.03 kg/m 3 respectively, the latter was 60 times approximately of the latter. The Weihe River has more sediment. Then the runoff and sediment of the Hanjiang River and the Weihe River were analyzed from 1981, the result showed that the annual average runoff of the Hanjiang River and the Weihe River were 585.05m 3/s and 195.89m 3/s respectively, which decreased 27.4% and 1.9% respectively. But the annual average sediment of the Weihe River was 54.85 kg/m 3, which increased 4.90% compared to that from 1935 to 1980, and the annual average sediment of the Hanjiang River was 0.41 kg/m 3, which decreased 53.41% Compared to that from 1935 to 1980. So from 1981, the annual average runoff of the Hanjiang River and the Weihe River decreased, but the annual average sediment in the Weihe River increased and the Hanjiang River decreased under global climate warming, the former was 133 times of the later. This showed that the climate environment of southern and northern areas to Qinling Mountains responded to the global climate warming.
出处
《地理科学》
CSCD
北大核心
2002年第4期403-407,共5页
Scientia Geographica Sinica
基金
国家自然科学基金资助项目 (4 0 0 710 5 )
陕西省自然科学基金资助项目 (99D0 1)
关键词
全球变化
秦岭
汉江
渭江
径流
泥沙
气候变化
global change
Qinling Mountains
Hanjiang River
Weihe River
runoff and sediment
