To reduce the impact of droughts and increase the resilience of regional water systems, various competing demands, such as hydropower, supply, irrigation and river ecosystems, need to be reconciled. In this perspective, for a sustainable and efficient management of the water resources, planners and practitioners would benefit from using the most recent data and easily accessible analysis tools, that can make hydrological model applications easier to apply. In this paper, a web-based open-source geoinformation tool for estimating Flow Duration Curves (FDCs) in ungauged basins is presented. The FDC estimation derives from a regional statistical model, that relates basin topographic parameters, climatic characteristic and other environmental factors to FDC features via multivariate regression. The software tool has the primary function of simplifying the GIS-intensive application of the multivariate methodology, allowing computation of the necessary basin features through web services. These are developed in compliance with the OGC specifications for geospatial Web Processing Service (WPS), while scripting and model implementation are developed server-side, which ensures the user access to always updated data, and to procedures free from software client compatibility issues. An operational application is available for the North-Western Italy.

为了减少干旱的影响并提高区域水系统的适应能力，需要协调各种竞争需求，例如水电，供应，灌溉和河流生态系统。从这个角度出发，对于水资源的可持续和有效管理，计划者和从业者将从使用最新数据和易于访问的分析工具中受益，这可以使水文模型应用程序更易于应用。本文提出了一种基于Web的开源地理信息工具，用于估算未加满盆地的流动持续时间曲线（FDC）。FDC估计值来自区域统计模型，该模型通过多元回归将流域地形参数，气候特征和其他环境因素与FDC特征联系起来。该软件工具的主要功能是简化多变量方法在GIS中的密集应用，并允许通过Web服务计算必要的盆地特征。它们的开发符合地理空间Web处理服务（WPS）的OGC规范，而脚本和模型实现则是在服务器端开发的，可确保用户访问始终更新的数据，并且程序不会出现软件客户端兼容性问题。可用于意大利西北部的运行应用程序。而脚本和模型实现则是在服务器端开发的，这可以确保用户访问始终更新的数据以及不受软件客户端兼容性问题影响的过程。可用于意大利西北部的运行应用程序。而脚本和模型实现则是在服务器端开发的，这可以确保用户访问始终更新的数据以及不受软件客户端兼容性问题影响的过程。可用于意大利西北部的运行应用程序。