Water Storage and Flood Regulation Functions of Marsh Wetland in the Sanjiang Plain
Water Storage and Flood Regulation Functions of Marsh Wetland in the Sanjiang Plain
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发表时间：
2007
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通讯作者：
L. Xing
中科院分区：
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作者：
L. Xing
分析了沼泽湿地的蓄水和防洪功能，根据三江平原挠力河流域宝庆站和蔡嘴子站1956 ~ 2000年的洪峰流量监测资料，在45年中有26年蔡嘴子站的洪峰流量小于宝庆站的洪峰流量，说明该流域洪水量较大沼泽地中的水扩散和储存湿地土壤的容重为0.10 ~ 0.28 Mg/m3，总孔隙度大于75%，土壤的持水能力与土壤的容重、孔隙度和持水量有关，土壤的持水能力与土壤的容重、孔隙度和持水量有关，土壤的持水能力与土壤的容重、孔隙度和持水量有关。三江平原的草根层和泥炭层的持水量为4 000 ~ 9 700 g/kg。根据三江平原湿地土壤的蓄水量、调蓄洪水的功能和生物多样性价值，计算出三江平原湿地土壤的蓄水量为46.97 × 108 m3。提出了禁止围垦和破坏河滩地，实施湿地生态保护工程的建议。
The water storage and flood control functions of marsh wetland were analyzed,based on the data of flood peak discharge monitored at Baoqing station and Caizuizi station in the Naoli river basin of the Sanjiang Plain from 1956 to 2000.The flood peak discharges monitored at Caizuizi station were less than those monitored at Baoqing station for 26 years during 45 years.It showed that there was a large amount of flood water spread and reserved in the marshes(their area is 28.82×104 hm2).The tremendous water storage capability of marshes was related to the bulk density,porosity and water holding capacity.The marsh soil bulk densities were 0.10 Mg/m3 to 0.28 Mg/m3,the total porosity was bigger than 75%,the water-holding capacities were 4 000 g/kg to 9 700 g/kg of grass root layer and peat layer in the Sanjiang Plain. It was estimated that water storage amount of marsh soils was 46.97×108 m3.Since marshes distribute at low land,average water level is 30 cm,then the water storage amount is 17.15×108 m3.According to water storage amount,flood regulation functions and biodiversity value of marshes in the Sanjiang Plain,the suggestions of forbidding reclamation and flood plain destroy were given.Ecological engineering for wetlands protection should be carried on.