The historical floods investigation and regional synthesizing of design floods at nearby hydrology stations are very important to increase the reliability and reasonability of the design floods.

历史洪水调查和邻近地区水文站设计洪水的地区综合对提高设计洪水的合理性和可靠性有重要作用。

youdao

The natural inducing factors refer the exceptional changes of regional geology and terrain, climate and hydrology situation;

从自然的角度来讲， 区域地质地貌、气候和水文等的异常变化是生态系统不稳定性和退化的自然成因。

youdao

In addition, there are other partners that contribute to the IHP implementation, such as: water-related government organizations, the academic sector, research institutes, NGOs and institutions related to hydrology, hydraulics and water quality at regional and international levels, among others.

UNESCO: International Hydrological Programme (IHP)