Published results on rainwater management systems revealed a lack of holistic science-based design principles. A new approach to rainwater management is proposed. Its necessity and feasibility are discussed. It is demonstrated that quantitatively harvesting rainfall and infiltrating a fraction should be mandatory. Thus, the primary site-specific parameter is the intensity of rainfall. Clearly, rainwater should be harvested and used everywhere as a valuable resource. Under arid semi-arid conditions large tanks maximize water storage for the long dry season while under humid conditions the same helps to minimize the frequency of emptying to avoid flooding. The new approach separates rainwater (and stormwater) from sewage and has the potential to maintain the natural hydrological cycle in urban areas despite urbanization. In already crowded slums, rainwater harvesting (RWH) can also be used to restore the hydrological cycle. The new approach advocates for decentralized RWH infrastructures to harvest, infiltrate, and store rainwater in individual residences, while piping overflows to semi-centralized cluster-scale tanks. Rooting integrated water resource management on RWH appears to be the missing puzzle in: (i) restoring the natural hydrological cycle where it has been disturbed (landscape restoration), (ii) avoiding flooding, and (i) mitigating soil erosion. This is essential for sustainable development.

关于雨水管理系统的公开结果表明，缺乏基于科学的整体设计原则。提出了一种新的雨水管理方法。讨论了它的必要性和可行性。结果表明，定量收集降雨并渗透一小部分应该是强制性的。因此，特定于站点的主要参数是降雨强度。显然，雨水应该作为宝贵的资源在任何地方收集和使用。在干旱、半干旱的条件下，大型水箱在漫长的旱季中最大限度地储存了水，而在潮湿条件下，这同样有助于最大限度地减少排空频率以避免洪水。这种新方法将雨水（和雨水）与污水分离，并有可能在城市化的情况下保持城市地区的自然水文循环。在已经拥挤的贫民窟中，雨水收集 （RWH） 也可用于恢复水文循环。新方法倡导分散式 RWH 基础设施，以收集、渗透和储存各个住宅中的雨水，同时通过管道溢流到半集中式集群规模的水箱。在 RWH 上扎根综合水资源管理似乎是缺失的难题：（i） 恢复受到干扰的自然水文循环（景观恢复），（ii） 避免洪水，以及 （i） 减轻土壤侵蚀。这对于可持续发展至关重要。