Soil - Plant - Atmosphere - Water Field & Pond Hydrology
<p><a href="https://www.nrcs.usda.gov/wps/portal/nrcs/detailfull/national/water/manage/drainage/?cid=stelprdb1045331">SPAW is a daily hydrologic budget model</a> for agricultural fields and ponds (wetlands, lagoons, ponds and reservoirs). Included are irrigation scheduling and soil nitrogen. Data input and results are …