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以松嫩平原为背景,在河流水资源结构分析的基础上,提出了平原地区洪水资源利用蓄水模型.综合考虑需求、可蓄水量以及蓄水时可承受的风险等因素,将洪水利用状况划分为全蓄型和分蓄型.根据蓄水区蓄水前后防洪能力的变化,提出模型应用风险分析标准及其评估方法.并以嫩江下游大赉河段为例,选择代表性水文年进行分析,结果表明:从利用角度,按照生态、农业需水状况引蓄洪水,不仅能够缓解春旱,而且所产生的蓄水风险也可以承受;从防洪角度,能够大幅度削减洪峰流量,所蓄水量能够提高枯水期河道径流量,改善河流水资源结构.
Based on the Songnen Plain, based on the analysis of the river water resources structure, a flood storage and utilization model was put forward for the floodplain in the plain area.Considering the demand, water storage capacity and the sustainable risk of water storage, According to the change of flood control ability before and after impoundment, a risk analysis standard and its assessment method are put forward.With the example of Datong reach in the lower reaches of Nenjiang River, the representative hydrological years The results show that flood diversion can not only ease the spring drought but also bear the risk of water storage from the point of view of utilization and in accordance with ecological and agricultural water demand conditions. Flood control can greatly reduce peak flow, Water storage can increase river runoff in dry season and improve river water resource structure.