Consequence of ecological and environmental variation the southern Gansu Province and protection countermeasures

The ecological environment in the southern Gansu Province is worsening,the ecology is very fragile and unsteady.Since 1950s, the ecological environment is in a degrading state:the river flow in the southern Gansu Province reduced,the sediment concentration in the rivers and soil-water loss increased,the forest coverage decreased and desertification of grasslands aggravated.This situation not only relates to the production and livings of the mass,but also directly influences the production safety of the mass in the middle and lower reach of the Yangtze River and the Yel- low River.The occurring causes of ecological problems in the southern Gansu Province are analyzed and the protection measures are put forward in the light of the problems.Protecting and restoring the ecological environment and promoting the regional economic sustainable development possess impor- tant real significance and long-term strategic significance.