SUGS - Sustainable water management of urban green spaces for resilience to heatwaves

该项目旨在在热浪和水资源短缺的限制下促进城市绿地水的可持续利用，以保持绿色空间作为城市热恢复能力的高效和有效的自然解决方案。热浪频率和强度的增加将导致冷却能源消耗和死亡率的增加，以及工人生产力的损失，这对经济造成了额外的负担。开发有效的抵御热浪的绿色空间需要可持续的水资源利用规划和精心管理，特别是在干旱和半干旱地区，灌溉是保护植物和产生冷却的关键因素。通过减少灌溉而不降低冷却效果来提高用水效率是具有挑战性的。该提案的成功有助于在联合国可持续发展目标3、6、11和13以及欧洲绿色协议的框架下节约用水和改善热浪下的热舒适。在这个项目中，将通过优化热舒适和灌溉之间的权衡，应用亏缺灌溉的管理策略来最大限度地提高应用水的生产率。由于植物的异质性、小而孤立的单个绿地以及各种小气候的存在，城市绿地需水量的估算是困难的。由于缺乏处理所有这些因素的办法，灌溉用水与实际用水需求之间的差距越来越大。该项目将使用三维微尺度模型ENVI-met来估算蒸散发，即蒸发和蒸腾过程中的水分损失。结果将根据四个绿地的现场测量结果进行评估。分析了热浪和缺水对绿地降温和热舒适的影响。通过验证和开发基于真实环境条件的ET估算的ENVI-met，本研究将极大地推进基于自然的热浪复原力的决策支持工具。

This project aims to promote the sustainable use of water for urban green spaces during heatwaves and water scarcity restrictions to maintain green spaces as efficient and effective nature-based solutions for urban heat resilience. Increasing heatwave frequency and intensity will result in increased cooling energy consumption and mortality rates, and loss of worker productivity, which impose an additional burden on the economy. The development of effective green spaces for heatwave resilience requires sustainable water use planning and careful management, especially in arid and semiarid regions where irrigation is a key factor to save plants and produce cooling. Improving water efficiency by reducing irrigation without decreasing cooling effects is challenging. The success of this proposal contributes to water conservation and improved thermal comfort under heatwaves in the framework of UN SDG 3, 6, 11 and 13, and European Green Deal. In this project, the management strategy of deficit irrigation will be applied to maximise the productivity of applied water by optimising the trade-off between thermal comfort and irrigation. Estimation of water requirement of urban green spaces is difficult because of the heterogeneous nature of plants, small and isolated individual green spaces and the presence of various microclimates. The lack of approaches addressing all these factors has increased the gap between the irrigation water application and real water demand. This project will use the 3D micro-scale model ENVI-met to estimate ET, water loss from the processes of evaporation and transpiration. The results will be evaluated against on-site measurements in four green spaces. The effects of heatwave and water shortage on cooling of green spaces and thermal comfort will be estimated. By validating and developing ENVI-met for ET estimations based on real environmental conditions, this study will greatly advance decision support tools for nature-based resilience to heatwaves.