In order to simulate the recovery of groundwater funnels under the condition of reducing groundwater abstraction, hydrogeological conditions of recoverability construction of Shijiazhuang groundwater funnel were analyzed, and a numerical simulation method was used based on the change of various parameters. The results show that the groundwater flow model can accurately reflect groundwater hydrogeological characteristics, and can guarantee the reliability of groundwater restoration prediction. The research has set up four schemes for rural water-saving, planting structure adjustment, urban reducing abstraction and integrated method. The effect of four restoration schemes on the restoration of groundwater funnels was compared with water table variations of two observation well. Comparison results show that the level changes of plan Three and Four are different from the other two kinds of exploitation and the drop trend of water table in the funnel area is flat. So we can conclude that Plan Three and Four have significant effect on the groundwater funnel restoration of Shijiazhuang.

As a typical alluvial-proluvial fan area in the Qaidam Basin,Nuomuhong is important to the research on paleoclimate reconstruction in proluvial fan areas and basin climate change and ecological protection. This paper analyzes features of ²H, ³H, ¹⁸O and ¹⁴C isotopes in Nuomuhong and reconstructs paleoclimate in this area. According to the results: since 28 ka B.P.,the ground average temperature decreases and then increases in the Qaidam watershed,reaching the lowest in 17.7 ka B.P. before increasing gradually. In the past 30000 years,average temperature has changed ranged from 1 ℃ to 5 ℃ in this area; the lowest temperature was different from today’s temperature only by 3 ℃. This shows that climate conditions and natural environment in this area have been relatively stable in the past 30000 years.

Based on such principles as sustainable development and ecological cycle, this paper evaluates the water resources carrying capacity (WCC) of Changchun-Jilin region using a population-economy-water resources correlation evaluation model built on the basis of WCC evaluation method as elaborated in the methodology of Functional Zoning of Population Development. Results show that the annual WCC of Changchun-Jilin region is able to support the population there, as a basic balance is struck between population and water resources. The incorporation of WCC into overall urban planning is one of the building blocks for sustainable city development with an advisable size.