ITR: DHARMA: Domain-Specific Metaware for Hydrologic Applications

在这个项目中开发的DHARMA特定领域的中间件系统的目的是让水文现场工程师解决水管理问题，在以前不可能的规模，与复杂的特定领域的计算管理系统。DHARMA用于通过互联网提供自动数据采集;从在线，本地和缓存资源的数据融合;中间结果的智能缓存，以允许在未来的仿真周期中重用;和智能调度，以优化元计算系统的执行时间。我们的目标流域模型WEPP是一个基于连续模拟处理的模型，代表了新的土壤侵蚀预测能力。然而，它是有限的，以目前的计算机技术非常小的流域。将WEPP模型应用于925平方英里的迪凯特湖流域，将带来流域尺度水文模拟的革命性变化。目前，所有的流域尺度水文模型都是基于经验关系。WEPP是唯一一个能够科学地解释土壤、泥沙输运、径流、河道水流、植物生长、分解、融雪、冻融效应和气候条件的模型。通过DHARMA，WEPP是唯一的模型，将提供准确的预测和评估替代流域管理措施对流域水质的影响。

The DHARMA domain-specific middleware system being developed in this project is intended to allow hydrologic field engineers to address water-management problems, on a scale previously impossible, with sophisticated domain-specific computational management systems. DHARMA is used to provide automatic data acquisition via the Internet; data fusion from online, local, and cached resources; smart caching of intermediate results to allow for reuse in future simulation cycles; and smart scheduling to optimize execution times on metacomputing systems. Our target watershed model, WEPP, is a continuous simulation processed-based model which represents new soil erosion prediction capabilities. However, it is limited to very small watersheds with current computer technology. A revolutionary change in hydrologic modeling on the watershed scale will be brought about by applying the WEPP model to the 925 square miles Lake Decatur watershed. Currently, all watershed scale hydrologic models are based on empirical relationships. WEPP is the only model which scientifically accounts for soils, sediment transport, runoff, channel flow, plant growth, decomposition, snow melt, freeze-thaw effects, and climatic conditions. Through DHARMA, WEPP is the only model which will provide accurate predictions and evaluate the effects of alternative watershed management practices on watershed water quality.