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江苏省微山湖以西包括丰县、沛县的全部和铜山县西北部,耕地面积337万亩,属黄河冲积平原,海拔高度30.5—44.5米,地势自西南向东北倾斜,比降1/3000—1/4000之间,南面邻废黄河堤北侧,为一条状洼地。水系基本上属于微山湖流域,主要的河流有复兴河、大沙河、鹿口河、郑集河等,多属间歇性的半地上河,汛期水满,受湖水顶托,排泄缓慢。母质以废黄河冲积沙性土为主,总厚度10—12米,垂直剖面中夹有数层厚度一般不超过10厘米的粘质土层,雨季渗入水受其阻隔,排水不畅,易形成临时上层滞水。潜水埋藏深度旱季一般3.0—4.0米,汛期内上升到1米左右,短期可距地表20—30厘米;地下水矿化度据多方面分析,缓坡地大部小于1克/升,有的1—2克/升,二坡地、洼地边缘地下水局部矿化达4—7克/升,水质以含HCO_3-Cl-Na-Ca最为普遍,矿化度增高,则Cl~-、SO_4~=
To the west of Weishan Lake in Jiangsu Province is Fenghe County and Peixian County, and the northwestern part of Tongshan County. The cultivated land area is 337 mu, belonging to the alluvial plain of the Yellow River at an altitude of 30.5-44.5 meters. The terrain slopes from southwest to northeast, with a drop of 1/3000 -1/4000, south of the waste adjacent to the north side of the Yellow River embankment, a depression. The water system basically belongs to the Weishan Lake Basin. The main rivers are the Fuxinghe River, Dashahe River, Lukou River and Zhengjihe River. Most of them are intermittent semi-above-ground rivers. The water is full during the flood season and excreted slowly by the lake. The parent material is dominated by alluvial sandy soil of waste Yellow River, with a total thickness of 10-12 meters. There are several layers of clayey soil with a thickness of not more than 10 cm in the vertical section. The permeable water is blocked by the rainy season, Upper stagnant water. Diving buried depth of 3.0-4.0 meters in general during the flood season, rose to about 1 meter, the short term can be 20-30 cm above the surface; groundwater salinity according to many aspects of analysis, most of the gentle slope to less than 1 g / l, and some 1- 2 g / l. On the other hand, the local mineralization of groundwater at the two slopes and the lowland edge is 4-7 g / L, and the water quality is most common with HCO 3 -Cl-Na-Ca and the mineralization degree is increased. Then Cl ~ -, SO 4 ~