论文部分内容阅读
一、水文地质特征水源地位于南京东郊仙鹤门一带,处于其林门一射乌山复式向斜中。为丘陵之间狭长的喇叭形盆地,西南高,东北低。横穿水源地中部的九乡河为长江支流,枯水期流量为2米~3/秒,洪水期可达200—300米~3/秒,最高水位15米,河床坡降3‰左右。区内属湿润的亚热带气候区,汛期六月至九月,枯水期十月至翌年五月。历年最大降雨量1516毫米,蒸发量1570毫米,年平均气温15.2℃。水源地为隐伏型盆状储水构造,长15公里,宽1—3公里,面积35平方公里。向斜轴向65°,与区内主要构造线方向一致。地层出露较简单、多为中生界、含水层为周村冲组(T_2z)角砾状灰岩,碎屑灰岩,白云质角砾状灰岩,角砾成分以灰岩为主,局部见有砂岩、石英、
First, the hydro-geological features Water source is located in the eastern outskirts of Nanjing, Crane Gate area, in its forest a shot Wu Shan duplex syncline. Hilly narrow trumpet basin, southwest high, northeast low. The tributary of the Jiuhe River, which crosses the middle of the water source, is the tributary of the Yangtze River. During the dry season, the flow rate is 2 m 3 / s and the flood period can reach 200-300 m 3 / s. The highest water level is 15 m and the riverbed is about 3 ‰. The area is humid subtropical climate zone, flood season from June to September, dry season from October to next May. The largest rainfall over the years 1516 mm, evaporation 1570 mm, the annual average temperature of 15.2 ℃. Water source for the concealed basin-shaped water storage structure, 15 km long, 1-3 km wide, an area of 35 square kilometers. Diagonal axis 65 °, consistent with the direction of the main tectonic line in the area. Stratum emerges relatively simple, mostly Mesozoic, the aquifer is Zhouzhongchuang Formation (T_2z) brecciated limestone, clastic limestone, dolomitic hornblende limestone, and the breccia is mainly composed of limestone. See some sandstone, quartz,