Climate change impacts on water sustainability of South African crop production.
Climate change impacts on water sustainability of South African crop production.
复制标题
DOI：
10.1088/1748-9326/ac80cf
复制
发表时间：
2022-08-01
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
干旱和半干旱地区的农业生产特别容易受到气候变化的影响，再加上预计的粮食需求，水资源的可持续管理对于确保国家和全球粮食安全至关重要。以南非为例，我们绘制了17种主要作物在当前和未来气候情景下的用水空间分布，并使用水债偿还时间指标评估其水资源的可持续性。我们发现，由于干旱地区的灌溉，马铃薯、豆类、葡萄、棉花、水稻和小麦的水债很高，这表明生产是不可持续的。气候变化情景表明，对水资源的这种压力将加剧，特别是在已经脆弱的地区，到2090年，国家规模的灌溉需求将增加6.5%至32%。未来的土地利用规划和管理应认真考虑作物需水量的空间分布和当地可持续性，以减少水风险热点地区的用水量，保障长期粮食安全。
Agricultural production in arid and semi-arid regions is particularly vulnerable to climate change, which, combined with projected food requirements, makes the sustainable management of water resources critical to ensure national and global food security. Using South Africa as an example, we map the spatial distribution of water use by seventeen major crops under current and future climate scenarios, and assess their sustainability in terms of water resources, using the water debt repayment time indicator. We find high water debts, indicating unsustainable production, for potatoes, pulses, grapes, cotton, rice, and wheat due to irrigation in arid areas. Climate change scenarios suggest an intensification of such pressure on water resources, especially in regions already vulnerable, with a country-scale increase in irrigation demand of between 6.5% and 32% by 2090. Future land use planning and management should carefully consider the spatial distribution and local sustainability of crop water requirements to reduce water consumption in water risk hotspots and guarantee long-term food security.
登录
查看更多内容
影响因子：
3.7
作者：
Hoekstra AY;Mekonnen MM;Chapagain AK;Mathews RE;Richter BD
通讯作者：
Richter BD
影响因子：
2.4
作者：
El Chami, Daniel;El Moujabber, Maroun
通讯作者：
El Moujabber, Maroun
影响因子：
6.6
作者：
Abraha, MG;Savage, MJ
通讯作者：
Savage, MJ
影响因子：
5.2
作者：
Monfreda, Chad;Ramankutty, Navin;Foley, Jonathan A.
通讯作者：
Foley, Jonathan A.
影响因子：
13.6
作者：
Mekonnen MM;Hoekstra AY
通讯作者：
Hoekstra AY