论文部分内容阅读
天津市蓟县地处华北平原与燕山山脉接壤的低山丘陵地带。全县山区、丘陵面积约为540平方公里,是中外闻名的震旦亚界标准地层出露地区。碳酸盐岩层出露面积达全区面积的三分之二。文化大革命前,曾是吃水贵如油的山区;近几年来,在农业学大寨运动推动下,全县基岩井已达百余眼,成井率达90%以上。本文是根据我院近两年水文地质普查资料,对蓟县山区岩溶裂隙水基本特征的总结。一、山川水系山区总的地势是北高南低,除石英岩和花岗岩构成的高大山峰外,碳酸盐岩层组成了起伏较缓的低山丘陵,海拔在200~500米之间,相对高差150~300米,切割中等,坡度较缓。山麓地带海拔仅20~50米,为由碳酸盐岩层构成的基岩浅埋区。
Jixian County, Tianjin is located in the North China Plain and Yanshan Mountains bordering the hilly areas. The county’s mountainous area, hilly area of about 540 square kilometers, is the world famous Sinian sub-standard stratum exposed areas. Carbonate rock outcrops area of two thirds of the area. Before the Cultural Revolution, it used to be a mountainous area where water was consumed as expensive as oil. In recent years, with the promotion of the Dazhai Campaign in agriculture, the base rock has reached more than 100 and the rate of well completion has reached 90%. This article is a summary of the basic characteristics of karst fissure water in Jixian mountainous area based on the census data of hydrogeology in our hospital in recent two years. First, the mountains and rivers The mountainous terrain is north of the high south, in addition to the quartzite and granite high mountain, the carbonate rock layer composed of gentle hills, elevation 200 to 500 meters, relatively high Poor 150 to 300 meters, cutting medium, gentle slope. Piedmont elevation of only 20 to 50 meters, composed of carbonate rock bedrock shallow buried.