The Landscape Performance Series Benefits Toolkit is a searchable collection of online tools and calculators to estimate landscape performance.
The tools can be used to estimate specific landscape benefits for completed projects when actual measurements are not available, or they can be used in the design phase to compare projected benefits among various options. Many tools also allow the user to compare life-cycle costs for conventional and sustainable design features.
Know of additional tools to calculate landscape performance benefits? Help build the database by sending your suggestions to firstname.lastname@example.org.
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Long-Term Hydrologic Impact Analysis
L-THIA estimates changes in recharge, runoff, and nonpoint source pollution resulting from past or proposed development. It estimates long-term average annual runoff for land use and soil combinations, based on community-specific long-term climate data. In the basic model, the only inputs are: location (state and county), soil type in area where the land use will occur (available online if unknown), and type and size of land use change (e.g., 100 acres of agricultural land converted to 50 acres high-density residential and 50 acres commercial). L-THIA will generate estimated runoff volumes and depths, and expected nonpoint source pollution loadings to water bodies. Results can be displayed in tables, bar graphs, and pie charts. More advanced models are available.
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Landscape Performance Series