Streamflow consists of several components that can be thought of as overland flow, interflow, and baseflow. Another commonly used technique estimates peak runoff from a given rainfall and can be a very useful calculation for designing wetlands especially if used for stormwater or flood control. This is the rational equation and was developed by SCS for small watersheds. Groundwater This is by far the hardest area to estimate for a water budget and it is usually done by difference. Numerical modeling U.S. Army Corps of Engineers Wetlands Research Program has a series of technical notes about identifying wetland hydrology, installing wells etc.
Nutrients are elements that are essential for life.
Living organisms require the availability of some 20 to 30 chemical elements for a variety of metabolic processes. While carbohydrates can be photosynthesized from water and carbon dioxide from the atmosphere, the more complex organic substances, like amino acids and proteins, require additional nutrients usually from the soil. Those elements needed in relatively large amounts are generally referred to as macronutrients. Those elements needed in trace amounts are generally called micronutrients. Limiting factors Nutrient inflows in wetlands are controlled by the water source and the rate at which water flows through the wetland - the residence time.