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勘测工作是一切水利建设底前哨,凡有关水利建设自然情况和社会情况的资料都是规划设计的根本依据。一切基本资料的正确性就是做好工程的关键,因此我们必须重视勘測工作底质量,使它满足于制订正确规划设计的要求。勘测工作范围很广,仅就测量、钻探而言,其目的:前者是用平面控制和高程控制的方法来测出
Survey work is the bottom of all water conservancy construction outposts, where the natural conditions of water conservancy and social conditions of the information are the fundamental basis for planning and design. The correctness of all the basic information is the key to doing a good job. Therefore, we must attach importance to the quality of the survey work and make it satisfy the requirements for formulating the correct planning and design. The scope of the survey is very wide. For the purposes of surveying and drilling, its purpose: the former is measured by means of plane control and elevation control