Valley harnessing is not limited to river regulation, but takes valley as basic unit, regards ecological environment, natural resources and social economy in the drainage basin as a interactive, interdependent and interinhibitive integrated ecologic-economic-social system, takes water resource management as core, ecological environment protection as orientation, keeps healthy life of rivers, adopts comprehensive means to realize sustainable development of social economy and environment.

We advocate ecological dredging and environmental dredging and proactively solve environmental dredging problems like sludge excavation, reservoir deep water dredging, long-range transport, curing utilization, remained water treatment, ecological environmental protection, etc.