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| 挠力河流域湿地和耕地变化对径流深的影响研究 | |
| 引用本文： | 刘正茂,吕宪国,赵艳波.挠力河流域湿地和耕地变化对径流深的影响研究[J].水文,2009,29(6). |
| 作者姓名： | 刘正茂 吕宪国 赵艳波 |
| 作者单位： | 1. 东北师范大学城市与环境科学学院,吉林,长春,130024;黑龙江农垦勘测设计研究院,黑龙江,佳木斯,154002 2. 中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,吉林,长春,130012 3. 黑龙江农垦勘测设计研究院,黑龙江,佳木斯,154002 |
| 基金项目： | 国家自然科学基金重点项目，亚洲开发银行/全球环境基金技术援助 |
| 摘 要： | 运用线性、对数、指数和三次函数关系拟合挠力河流域1956～2000年湿地面积、耕地面积以及面降水量对径流深的影响,得出:①三次函数拟合的相关性最好;②湿地面积减少和耕地面积增加与径流深的相关性小于面降水量与径流深的相关性.通过分析湿地面积减少和耕地面积增大对径流递减贡献机理,认为湿地面积减少,降低了湿地冷湿效应,增加了陆面蒸发的潜力;湿地转变成耕地,改变了土壤对降水的再分配过程;耕地面积的扩大增大了土壤蒸发潜力;旱地改成水稻田增大了地表水的利用率和地下水的利用量,这些是流域地表径流深减小的原因.研究结论显示湿地面积的减少和耕地面积的增加对流域径流深的递减有较为明显的贡献;径流深的减小是流域呈干旱趋势的指征. |
| 关 键 词： | 湿地和耕地 土地利用变化 径流演变 挠力河流域 |
Influence of Wetland and Farmland Changes on Runoff Depth in Naolihe River Basin |
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| LIU Zheng-mao,LV Xian-guo,ZHAO Yan-bo.Influence of Wetland and Farmland Changes on Runoff Depth in Naolihe River Basin[J].Hydrology,2009,29(6). | |
| Authors: | LIU Zheng-mao LV Xian-guo ZHAO Yan-bo |
| Abstract: | The wetland area decrease and farmland area increase are typical changes of landscape of the Naolihe River basin since 1950s. By adopting linearity,logarithm,exponential,and cubic function to simulate the correlation between the wetland area,farmland area and area precipitation and runoff depth in the basin,respectively,the results show:(1) The simulation correlation of cubic function is best;(2) The correlation between the wetland area decrease and farmland area increase and runoff depth is less than that between the precipitation and the runoff depth.By analyzing the mechanism of contribution from the wetland area decrease and farmland increase to the runoff depth decline,it is believed that the wetland area decrease reduce the "cold-wet effect" of wetland,and enhance the terrestrial evaporation potential;the conversion from wetland to farmland changes the redistribution processes of precipitation in soils;the farmland area increase enhances the evaporation potential of soils;the conversation from dry farmland to paddy field increase the water utihzation quantities of the surface water and groundwater,which result in reducing the runoff depth. The research conclusions show that the wetland area decrease and farmland area increase makes a more obvious contribution to the runoff depth reduction.The runoff depth reduction is an indicator of a basin appearing in a drought tendency. It is supposed to strengthen the wetland conversation and restoration,especially restore the water connection relation between river and marsh wetland,control the area of paddy filed, and enhance the reservoirs"regulating wetland ecological water supply. |
| Keywords: | wetland farmland land utilization changes runoff evolvement Naolihe River Basin |
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