—、如何做好查勘前的准备工作查勘工作的能否达到预期目的,有成效地完成任务,这和查勘前的准备工作做得是否完善有密切的关系。流域规划阶段查勘的准备工作,要比设计阶段查勘时?得多;因为在流域规划开始以前,我们对所要研究的河流的资料,一般都很少,有的可能已经过初步勘测或普查,有的可能什麽工作都还没有做过。这样,它的准备工作就显得更重要。如果做得不好的话,会使今後工作走弯路。查勘前的准备工作,主要是已有资料的搜集、整理和研究工作。编制流域规划,应该尽量利用已 How to do a good job of preparing for a survey? Whether the investigation work can achieve the expected purpose and accomplish the task productively is closely related to whether the preparatory work before the survey is done or not. The preparatory work for the river basin planning phase of the survey is much more time-consuming than that for the design phase of the survey. Before the start of the river basin planning, we usually had little or no information on the river to be studied. Some of them may have undergone preliminary surveys or censuses, May have not done any work. In this way, its preparation becomes even more important. If you do not do well, it will make detours in the future. The preparatory work before the survey is mainly the collection, collation and research of the existing data. The preparation of basin planning, should make full use of it