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一、前言作者于1999年11月承担了为公安部北京警犬训练基地寻找生活用水选址的勘察任务。根据任务的要求,选址在200m×200m的场区内进行,单井出水量须满足每昼夜30～50m~3的基本要求,最好达到每小时10m~3的出水量。基地场区位于北京市昌平县桃峪口乡境内,距下游桃峪口水库约2km,坐落在基岩与坡洪积交界的平台上。地理坐标为东经116°26′40″,北纬40°15′00″。依据场地条件和任务要求,选择两种技术途径来实现基地生活用水井井位的勘察工
I. Introduction In November 1999, the author assumed the task of reconnaissance for locating domestic water for the Beijing Police Dog Training Base of the Ministry of Public Security. According to the requirements of the mission, the site selection should be carried out within the field area of 200m × 200m. The single-well water discharge shall meet the basic requirements of 30 ~ 50m ~ 3 per day and night, and it is best to reach the output of 10m ~ 3 per hour. The basement field is located in the territory of Peach Yukou Township, Changping County, Beijing, about 2km away from the downstream Taoyoukou Reservoir, and is located on the platform of the boundary between bedrock and slope flood accumulation. The geographical coordinates are 116 ° 26’40 “east longitude and 40 ° 15’00” north latitude. According to the site conditions and mission requirements, choose two technical ways to achieve the base of the well water well survey engineer