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 the severe water shortage situation in Beijing that is restricting urban construction and economic development. This has created an urgent need to bu...
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| Autores principales: | , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/45167d9012014cbd80739c44349bd3fe |
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| Sumario: | Currently, the number of urban garden green spaces (GGSs) being constructed in Beijing is increasing, and their high water resource demands contradict the severe water shortage situation in Beijing that is restricting urban construction and economic development. This has created an urgent need to build water-saving GGSs. This study analyzed and compared the daily/annual water consumption of 79 common plants in Beijing, and low-water-consumption (LWC) trees, shrubs and herbs were selected; additionally, the total annual water consumption (TAWC) of all plants in the built-up areas of all 16 districts in Beijing was calculated according to the result of the eighth general survey of landscaping resources in Beijing. The results are as follows: (1) fifteen LWC tree species were selected from among 25 species, and the average daily water consumption (DWC) was <1.09 kg·m<sup>−2</sup>; (2) nineteen LWC shrubs were selected from among 35 shrubs, and the average DWC was <1.17 kg·m<sup>−2</sup>; (3) eleven LWC herbs were selected from among 19 herbs, and the AWC was <460.3 kg·m<sup>−2</sup>; (4) the TAWC of all trees, shrubs and herb plants in the Beijing GGSs was 1.104 × 10<sup>9</sup>, 0.139 × 10<sup>9</sup>, and 0.16 × 10<sup>9</sup> m<sup>3</sup>, respectively. Based on the above results, it was estimated that the TAWC of all plants in the built-up areas of all 16 districts in Beijing is approximately 1.403 × 10<sup>9</sup> m<sup>3</sup>. These findings provide a better understanding of the water consumption of GGS plants in cities in semiarid and semihumid climates and can be used to help select LWC greening plants that can reduce water consumption when expanding green areas in cities. |
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