Seite - 321 - in Book of Full Papers - Symposium Hydro Engineering

Figure 4. Air temperature comparison of A County pre and post water storage of the reservoir Figure 5 shows that air humidity in A County rises greatly after water storage. In total, the maximum humidity difference is 25% in spring. Increases in both the evaporation area of the reservoir water surface and the environmental temperature are the main reasons for air humidity increasing. In contrast with other seasons, the air humidity in summer shows little increasebecause of the high humidity and temperatures in this season,when it is difficult to break air vapor balance. Figure 5. Air humidity comparison of A County pre and post water storage of the reservoir Precipitation of A County is mainly concentrated between the months of May and September, which have 78% of annual precipitation.As illustrated by the air humidity analysis in Figure 6,air humidity is relatively higher in late spring, summer and early autumn,and could be beneficial in the vapor condensation process.Monthly mean precipitation is above 120mm between June to August,so potential flood disasters should be considered due to extreme weather events. 321