TRIGRS — The Complete Guide: Rainfall-Triggered Shallow Landslide Hazard Maps
USGS TRIGRS computes, cell by cell on a raster, how rain infiltration raises pore pressure and lowers slope safety, flagging where shallow landslides may occur.
Guides and Articles
MEASUR — The Complete Guide: Energy Assessments for Industrial Systems
MEASUR from the US DOE and ORNL is an open-source suite for plant energy audits: pumps, fans, steam, compressed air and process heat, plus many calculators.
GridLAB-D — The Complete Guide: Simulating Distribution Grids and End Uses
PNNL’s GridLAB-D simulates a distribution grid over time together with its end uses: buildings and HVAC, water heaters, solar, batteries and electric vehicles.
PFLOTRAN — The Complete Guide: Subsurface Flow and Reactive Transport
PFLOTRAN is a parallel open-source code for multiphase flow and reactive transport in porous media: contaminant plumes, CO2 storage, repositories, geothermal.
REopt — The Complete Guide: Optimal Sizing of Solar, Storage and CHP
NREL’s REopt finds the optimal size and economics of solar PV, wind, batteries and CHP for a building, campus or microgrid, plus backup time for critical loads.
WISDEM — The Complete Guide: Systems Design and Optimisation of Wind Turbines
WISDEM is an open-source Python framework for conceptual design and optimisation of wind turbines and plants: rotor, drivetrain, tower, floating bases, LCOE.
BEES Online — The Complete Guide: Choosing Building Products by Environment and Cost
NIST’s BEES Online compares alternative building products by environmental life cycle assessment and life-cycle cost, grouped by UNIFORMAT II. Free online.
BLCC — The Complete Guide: Life-Cycle Cost Analysis for Buildings and Systems
NIST’s BLCC compares design options by life-cycle cost, with net savings, SIR, adjusted internal rate of return and payback. A free public-domain web app.
Sound Insulation Estimator — The Complete Guide: Sound Insulation Upgrades and Their Cost
A free Excel tool developed for NAVFAC that picks sound insulation upgrades for walls, roof and windows, costs them and meets an indoor aircraft noise goal.
HI Pump Savings Calculator — The Complete Guide: Justifying an Efficient Pump with Numbers
A free Hydraulic Institute Excel workbook that compares pumps by Energy Rating, calculates life-cycle savings and checks whether adding a VFD pays off.
HI Data Tool — The Complete Guide: Pipe and Pump Calculators in the Browser
The Hydraulic Institute’s HI Data Tool puts pipe friction, viscosity, tank volume and atmospheric pressure calculators in the browser, plus pump notes.
SNAP-2 — The Complete Guide: Free Soil Nail Wall Design from FHWA
FHWA SNAP-2 designs soil nail walls: nail and facing checks, internal and external stability and global slope stability per FHWA guidance. Free, for Windows.