Fully customizable SUMMA model can mimic existing models or create something new
“Water falls from the sky, runs across the earth, funnels into drainages, and fills rivers.
It seems simple. But total precipitation does not equal total streamflow. Along the way, some of the water gets sucked up by plants, absorbed by the soil, or evaporated into the air. A complex array of factors—from wind speed to geology—influences how much precipitation converts into streamflow and at what speed.
Hydrologic models for predicting streamflow each capture these variables in different ways. This can lead to large disparities in their results and, therefore, large headaches for water managers who depend on the forecasts to plan for the future…”