Regionalization of natural flow regimes in Ebro Basin
Solans and Poff (2012) elaborated a river classification of Ebro Basin (Spain), based on 54 hydrological variables with sound ecological meaning. A close link between geographic site location and characteristics of 6 natural flow regimes was found. Based on this classification, the goal of present paper is the identification of regions under similar natural flow conditions that can work as management units for ecological research and environmental flow guidelines design. The regionalization of the 6 natural flow classes was carried out through high correlations between flow classes and climatic and watershed descriptors. Annual precipitation, annual evapotranspiration, annual air temperature, elevation, catchment area, density drainage and geology were used as discriminant parameters. Discriminant parameters were obtained from the 51 sites previously classified in Ebro basin, and were used as classificatory variables to allocate 128 sites with poor or no natural flow data, into the groups. Misclassification rates obtained by cross-validation ranged between 1,11% (2/179) and 11,9% (5/42). Additionally, non metric multi-dimensional scaling on stream macroinvertebrate families resulted in a clear separation of the sites into the five hydrological classes with available data. Analysis of similarities (ANOSIM) resulted in significant global differences in macroinvertebrate communities among the hydrological classes (Global R = 0.251, p=0.0002). Pairwise comparisons showed significant differences (p<0.05) between most of the groups.
natural flow regimes landscape-based models environmental flows
M.Alba Solans Andrés Mellado-Díaz
Departamento de Ingeniería Forestal, Universidad Politécnica de Madrid, E-28040 Madrid, Spain Centro de Estudios Hidrográficos (CEDEX), E-28005 Madrid, Spain
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
465-482
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）