Multilateral cooperation included 19 sectors, including planning, finance, metrology, agriculture, forestry, environmental prevention, civil affairs, communication, transportation, construction and so forth, to implement the operation and distribution of rainwater. Annual training course to local authorities and individuals has been conducted toward effective storage and use of rainwater each year.
Control of pollutants: The total quantity control of water pollution, issued by the Ministry of Environmental Protection, is a principal standard filtering polluted ones. The rainwater harvesting from floods shall meet the standard of total quantity control of water pollution. The contribution of storage and use of rainwater can also be presented from trilateral aspects, including flood control, more water resources against drought and ecological environment.
This case has been implemented along with state master plan of flood control and drought relief which is effective for flood fighting and diversion. On the other hand, rainwater, as available water resources, is able to alleviate water shortage particularly in dry season or dry zones. Concerning the improvement of ecology and environment, in mid August in 1996, extreme heavy flood occurred in the mid-south part of Hebei.
Through the use of the above methods, it stored extra 1.7 billion m3 surface water in that year, recharged into ground water 7.5 billion m3 and increased soil water about 10 billion m3, also rushed away large amount effluents, pollutants. It plays the role of mitigation of flood disaster and improvement of ecological environment.