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水文测量主要的分为两部份:(1)流量。(2)含沙量。洪水时期,水流很急,水量很大,含沙量也很高,所以流量测量非常困难。但水文资料又特别重要,要在洪水时期实施水文测量,首先应该有交通设备,在峡谷处可用钢索桥,在宽畅处可用机船。有了索桥或机船可以控制位置,避免危险,并可采用(?)扬机,因之可以用较重的流速仪,采沙仪和探深锤,以便在急流中测量水文。机船必须有车铁锚或锚索(钢丝
Hydrographic measurements are mainly divided into two parts: (1) flow. (2) Sediment content. During the flood period, the flow of water is very urgent, the water is very large and the sediment concentration is also very high, so the flow measurement is very difficult. However, hydrological data are of particular importance. To carry out hydrological measurements during the flood season, first of all there should be traffic equipment available at the canyon where a steel cable bridge can be used and a wide range of machineboats are available. With a rope bridge or a boat, you can take control of the position, avoid danger, and use the (?) Lifts, so heavier meters, sand trackers, and penetration hammers can be used to measure the hydrology in the rapids. Boat must have a car iron anchor or anchor (wire