Selection of Water-Saving Plants and Annual Water Consumption Estimation for Garden Green Spaces in Beijing

Currently, the number of urban garden green spaces (GGSs) being constructed in Beijing is increasing, and their high water resource demands contradict severe shortage situation that restricting construction economic development. This has created an urgent need to build water-saving GGSs. study analyzed compared daily/annual consumption 79 common plants Beijing, low-water-consumption (LWC) trees, shrubs herbs were selected; additionally, total annual (TAWC) all built-up areas 16 districts was calculated according result eighth general survey landscaping resources Beijing. The results are as follows: (1) fifteen LWC tree species selected from among 25 species, average daily (DWC) <1.09 kg·m−2; (2) nineteen 35 shrubs, DWC <1.17 (3) eleven 19 herbs, AWC <460.3 (4) TAWC herb GGSs 1.104 × 109, 0.139 0.16 109 m3, respectively. Based on above results, it estimated approximately 1.403 m3. These findings provide a better understanding GGS cities semiarid semihumid climates can be used help select greening reduce when expanding cities.