Evaluation of the Status Quo of Ecological Environment in Sule River Basin, Gansu

By enacting index and environmental quality scale of eco-environment in the Sule River basin, based on cumulative subjective probability method, six sub-systems (the degradation of natural vegetation, shrinkage and wither-away of rivers and lakes, regional soil secondary salinization, land desertification, soil and water loss, water pollution) were evaluated. The results show that the status quo of ecological environment in the Sule River basin is normal (third grade). However, there are many problems to be resolved, to which more attention should be paid in the future develop decision-making.