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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Showing 3 Results for S
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SPAW Field & Pond Hydrology Model
The SPAW (Soil-Plant-Air-Water) model simulates the daily hydrologic water budgets of agricultural landscapes with two connected modules, one for farm fields and one for impoundments such as wetland ponds, lagoons or reservoirs. The model was developed to understand and predict agricultural hydrology and its interactions with soils and crop production. It can be adapted to a wide variety of hydrologic analyses including: Estimation of runoff and seepage from agricultural fields and design and performance evaluation of agricultural ponds, lagoons and reservoirs for water supply, waste management and water management. Simulation results estimate a daily vertical water budget depth of all major hydrologic processes including runoff, infiltration, evapotranspiration, soil water profiles and percolation. The SPAW model is free, but users must register to download and install the program.Benefits
Storm Water Retention Calculator
This Excel-based calculator estimates the amount of water a green roof can retain. Inputs are: green roof area, inches of rain for local 10-year storm, and parameters for the green roof growth media, moisture retention fabric, and drainage core. The calculator yields total gallons of water retained, gallons per square foot, weight of water retained, and the runoff coefficient.Benefits
This Excel-based calculator was designed as an awareness tool to give a general idea of what is needed to keep pre- and post-development runoff volume the same. It can be used to compare the increase in runoff volume for development with and without stormwater BMPs. The calculator is designed for California communities, but users from elsewhere can input their own rainfall data to use the calculator. Inputs include: project site area, existing and proposed dominant non-built land use types, and existing and proposed roof and non-roof built area. The user then fills in various worksheets for BMPs used, such as porous pavement, downspout disconnection, and green roofs. Outputs are: pre-project runoff volume, project-related runoff volume increase without BMPs and project-related volume increase with BMPs.
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Landscape Performance Series