江苏沿海滩涂地下水埋深及矿化度变化规律

Variation law of groundwater depth and mineralization of coastal tidal flats in Jiangsu Province

为加快江苏沿海滩涂新垦区脱盐改良的步伐,选择典型区域开展野外定位测试,统计并分析特定水文及环境条件下地下水埋深及矿化度的变化规律。结果表明:江苏沿海滩涂地区降水量充足,降雨时空分布不均,5—9月的降水量约占全年降水量的73%;研究区的地下水埋深与降水量、蒸发量及其附近的梁垛河水位的相关系数分别为0.94、0.78、0.51,均呈极显著相关关系;地下水矿化度与降水量、蒸发量呈极显著相关关系(相关系数分别为0.79和0.66),与地下水埋深呈显著相关关系(相关系数为0.42)。

To accelerate the desalination improvement of coastal tidal flats in Jiangsu Province,a typical area was selected for field location tests.The variation rules of groundwater depth and mineralization under specific hydrological and environmental conditions were statistically analyzed.The results show that the rainfall on coastal tidal flat areas in Jiangsu is abundant,and the spatial and temporal distribution of rainfall is uneven.The rainfall from May to September accounts for 73%of the annual rainfall.The correlation coefficients between groundwater depth and rainfall,evaporation and the water level of the Liangduo River near the study area are 0.94,0.78 and 0.51,respectively,showing extremely significant correlation.The groundwater mineralization is significantly correlated with rainfall and evaporation with the correlation coefficients of 0.79 and 0.66,respectively.It is also significantly correlated with groundwater depth with the correlation coefficient of 0.42.