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The climate changes and human activities have caused great influences on the process of the hydrological cycle and destroyed the consistency of hydrological series. In this condition, doing hydrological frequency calculation based on the analysis method of non-stationary series will be more reasonable. This paper selects the annual maximum flood peak series from 1956-2010 of Da Po Ling and Lu Tai Zi station in Huaihe main stream to analyze. Several methods are used to do trend diagnosis and jumping diagnosis. The result shows that the variation of Da Po Ling and Lu Tai Zi series which belongs to jumping type occurs in 1981 and 2001. In addition, the annual maximum flood peak in Da Po Ling station has decreased under the future condition and the flow reductions in flood season, normal season, dry season are respectively 2.22% - 18.51%, 18.51% - 19.48%, 19.48% - 97.27%; the annual maximum flood peak in Lu Tai Zi station has increased and the flow increases in flood season, normal season, dry season are respectively 4.43% - 27.76%, 27.76% - 45.90%, 45.90% - 473.51%. Considering the hydrological variation and using the results under the future condition to calculate the design value can provide a scientific basis for planning and management of water resources in the Huaihe River basin.
The long-time inappropriate exploitation of river resources has led to the damages of river ecosystem and structural dysfunction, threatening the sustainable development of society as a whole. The river health issues have emerged as a result. How to carry out river health assessment and river management is vital to the development of harmonious relationship between nature and human being. This review has discussed the connotation of river heath and summarized various methods of evaluating river health at home and abroad. Meanwhile, in view of the status of river health assessment in our country, some suggestions have been put forward that river monitoring plan should be carried out and nationwide river health assessment guidelines should be established in the future.