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Pearl River is a river of China 's southern and abundant precipitation , the average annual rainfall is 1475.0mm, ranking the first of the 7 major river basins . The total water resources are rich , multi-year average total water resources of 338.5 billion m to the surface water resources of 338.1 billion m 3 of the 7 major river basins after the Yangtze River . However, due to the precipitation spatial and temporal distribution is very uneven , population density , land distribution is extremely uneven economic development , the Pearl River water shortage problem persists . Recent years, with the rapid growth of the economy , on the one hand, agricultural, industrial and urban domestic water demand is increasing day is significantly less than the water supply capacity . On the other hand , are becoming increasingly serious water pollution problems brought about by the economic development , exacerbated by water shortages . At the same time , since the 1990s the Pearl River Basin floods and droughts are frequent , and the losses caused by flood and drought disasters and the impact of more and more serious . In many parts of the basin due to various reasons , the use of water resources status quo is not optimistic , can not meet the multifaceted water demand , water shortage problems have become increasingly prominent , the lack of water type presents diversity . The increasing emphasis on ecological water demand under the guidance of the new ideas in the current flood control . Faced with the new requirements of the outstanding issues and the new era of water management of the water resources utilization , the Pearl River Basin is an urgent need to develop appropriate water management measures and adjust the strategy of basin water conservancy construction . Text by the Pearl River Basin water resources quantity, quality analysis and evaluation of quantitative calculation , analysis and evaluation of basin water resources development and utilization of the current situation , focus on watershed areas based on water resources utilization profiling to identify problems and solve water resource management , scheduling and classification proposals and related issues .
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