There are 1539 reservoirs with store capacity of 1.15 billion stere, 429 floodgates, 154 dike with total length of 902 kilometers, defending the farmland of 80 ten thousand acres and the population of 1.75 million. 267 projects of irrigation with flux of 98 steres /sc have been built and the installed capacity of irrigation and drainage is 49000 kwh. The installed capacity of small water power station is 197000 kwh and the annual water supply of the irrigation works is 1.4 billion steres, irrigating the area of 1.28 million mu. The system of irrigation works is nearly formed with multifunction of flood control, water logging control, supply water, water power generating and preserving.