河流健康的等级分为五等：很健康、健康、亚健康、疾病、严重疾病。
The River health levels are divided into five: very healthy, health, sub-health, disease, serious illness.
将水坝对河流生态系统的影响因素划分为非生物要素和生物要素两大方面，并根据影响程度划分为三个等级；
Factors affected on dams were divided into two sections: abiotic factor and biotic factor, and the degree of effects was divided into three grades;
为了使区域洪涝研究更为具体和可比，本文在分析区域洪涝指标的基础上．提出了流域性洪涝的概念，并以《中国近五百年旱涝分布图集》为基础，建立了淮河流域500年流域性洪涝指标序列及其等级。
It is for the practice and comparison of regional flood research that the idea of Basin-Wide Flood(BWF)is further proposed. Moreover, the index and grades of BWF for last 500-year period in Hua…
应用推荐