Jurisprudential analysis: 1 and large-scale (1) reservoirs: total storage capacity 1 100 million cubic meters. The flood control level is particularly important, with 5 million mu of farmland protected, 2 million mu of waterlogging control area and irrigation area 1.5 million mu. The water supply level is particularly important, with installed capacity/kloc-0.

2. Large (2) reservoir: total storage capacity10 ~100000 cubic meters, with important flood control grade, farmland protection of 5 million ~100000 mu, waterlogging control area of 2 million ~ 600000 mu and irrigation area of1500000 ~ 500000 mu.

3. Medium-sized reservoir: total storage capacity 1.0 ~ 1 100 million cubic meters, moderate flood control level, protected farmland100 ~ 300,000 mu, waterlogging control area of 6 ~150,000 mu, irrigation area of 5 ~ 50,000 mu, moderate water supply level and installed capacity.

4. Small (1) reservoir: the total storage capacity is 0. 10 ~ 0.0 10 billion cubic meters, the flood control level is general, the farmland is protected from 3 million to 50,000 mu, the waterlogging control area is15 ~ 30,000 mu, and the irrigation area is 5 ~ 0.5 million mu.

5. Small (2) reservoir: the total storage capacity is 0.0 1 ~ 0.00 1 100 million cubic meters, with 50,000 mu of farmland, 30,000 mu of waterlogging control area and 0.5 million mu of irrigation area, with poor water supply level and installed capacity 1.

Legal basis: Supplementary Provisions on Classification and Design Standards of Water Conservancy and Hydropower Projects (Mountainous and Hilly Areas) SDJ 12-78 (for Trial Implementation).