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一、地下水赋存的基本条件本区出露地层主要为中、上侏罗统,红色砂、泥岩互层,约占图幅面积的96%,实测厚度为680m,包括中统的上沙溪庙组(J2S)上部,上统的遂宁组(J3S)和蓬莱镇组(J3P)近底部地层;第四系(Q)松散岩类约占4%,厚度一般16m～66.3m。其中,中、上侏罗统砂、泥岩层为本区地下水赋存的主要含水层。区内构造形迹简单,褶皱舒缓,大部分岩层近于水平,倾角一般1°～3°,构造裂隙很少发育,仅在构造复合、转折部位发育较好。广布红层丘陵地区的风化带裂隙水,不仅受上述地层岩性、地貌条件及风化带特点的控制,而且以埋藏于浅部的潜水为主,泉井普遍水质良好。潜水含水带厚度一般10m～30m左右,少数钻孔
First, the basic conditions for the occurrence of groundwater Exposed area is mainly exposed in the Middle-Upper Jurassic, red sand, mudstone interbed, accounting for about 96% of the map area, the measured thickness of 680m, including the Central Plains Shahe Upper J2S, Upper S3 Suining (J3S) and Penglaizhen Formation (J3P) are near the bottom. Quaternary (Q) loose rocks account for about 4% of the total thickness, with thicknesses ranging from 16m to 66.3m. Among them, the Middle and Upper Jurassic sand and mudstone formations are the main aquifers that the groundwater in the area has. The structural features in the area are simple and the folds are soothing. Most of the strata are nearly horizontal and the dip angle is generally 1 ° -3 °. The structural fissures rarely develop. Only in the tectonic complex is the turning point well developed. The fissure water of the weathered zone in the hilly area with wide red beds is not only controlled by the lithology, geomorphology and weathered zone characteristics of the above strata, but also mainly submerged in the shallow part. The well water quality is generally good. Diving aquifer thickness generally 10m ~ 30m or so, a few holes