| 从乐都水文站水沙变化看湟水流域生态建设成效 |
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| 引用本文： | 王秀莲,蔡宜晴,唐洪波.从乐都水文站水沙变化看湟水流域生态建设成效[J].中国水土保持,2012(8):26-28. |
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| 作者姓名： | 王秀莲 蔡宜晴 唐洪波 |
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| 作者单位： | 青海省水文水资源勘测局,青海西宁,810001 |
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| 摘 要： | 通过对乐都水文站径流量、输沙量、降水量进行分析,探讨了青海省湟水流域退耕还林还草的效益:2000—2010年,青海省湟水流域各县(市)累计完成退耕还林还草面积14.71万hm2,2002年退耕还林还草效益开始显现,年径流量和年降水量开始增加,年输沙量和年输沙模数明显减少,退耕后的年输沙量和年输沙模数分别比退耕前减少了467万t和359 t/km2。鉴于青海省湟水流域退耕还林还草工程区生态环境总体上还比较脆弱,提出了延长退耕还林还草补助政策的时间、加大基本口粮田建设力度、调整产业结构、提高全社会的生态意识等建议。
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| 关 键 词： | 生态建设 水沙变化 退耕还林还草 治理成效 乐都水文站 湟水流域 |
Viewing Achievements of Ecological Building in Huangshui Watershed from Silt-Discharge Variation of Ledu Hydrometric Station |
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| WANG Xiu-lian,CAI Yi-qing,TANG Hong-bo.Viewing Achievements of Ecological Building in Huangshui Watershed from Silt-Discharge Variation of Ledu Hydrometric Station[J].Soil and Water Conservation In China,2012(8):26-28. |
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| Authors: | WANG Xiu-lian CAI Yi-qing TANG Hong-bo |
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| Institution: | (Qinghai Bureau of Hydrologic and Water Resources Survey,Xi’ning,Qinghai 810001,China) |
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| Abstract: | Though analysis on runoff,sediment discharge and precipitation of Ledu Hydrometric Station,the paper discussed the benefits of returning farmland to woodland and grassland of Huangshui watershed in Qinghai province.In the period of 2000-2010,the accumulated area of returning farmland to woodland and grassland of each county in the watershed was 147 100 hm2.The benefits of returning farmland to woodland and grassland began to show in 2002,when annual runoff and annual precipitation began to increase,but annual sediment discharge and annual sediment runoff modulus reduced remarkably.The annual sediment discharge and annual sediment runoff modulus after returning works had been reduced 4.67×106 t and 359 t/km2 respectively comparing with that before the returning works.In viewing of the weaker ecological environment of returning works area of the watershed,it put forward the suggestions to extent the time for subsidy policy of returning farmland to woodland and grassland,redouble our efforts to build basic farmland,readjust industrial structure and enhance ecological consciousness of the whole society. |
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| Keywords: | ecological building silt-discharge variation returning farmland to woodland and grassland treatment achievements Huangshui river |
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