北大港水库分库后底泥盐渍化程度分析

Analysis of Sediment Salinization Degree of Beidagang Reservoir after Divided

针对滨海地区众多水库水质咸化现象,以北大港水库为例,通过对北大港西库11个采样点底泥样品的全盐量、Cl-含量及pH值的测试,分析了盐分在底泥中的水平和垂直分布特征,并利用盐化程度评定标准对北大港底泥盐渍化程度进行评定。结果表明,北大港水库底泥大部分属于滨海盐土与重盐渍土,极少部分属于中盐渍土,全盐量均值为0.65%,Cl-均值为0.31%,盐渍化程度较重;指出底泥盐渍化的影响因素并提出相应的防治措施。

In view of the fact that many reservoirs in coastal area have the phenomena of water salinization, taking Beidagang reservoir for an example, this paper analyzes the characteristics of salinity＇s horizontal and vertical distribution by measuring the total salt content, Cl^- as well as pH of 11 sampling points in the west part of Beidagang reservoir. And then it evaluates sediment salinization degree through the standard of salinization evaluation. The results show that most of Beidagang reservoir＇s sediment is classified as coastal soil and heavy saline soil; only a very small part is moderate sa- line soil; the total salt content is 0.65% and the Cl^- content is 0.31% ; the influencing factor of sediment salinization is pointed out and the corresponding protection measures are put forward.