MA-08 | Worcester County, Southern Part - 1998. Typical pattern of soils and underlying material in the Hinckley-Merrimac association (Soil Survey of Windham County, Conneticut 1981). Typical pattern of soils in the Hinckley-Merrimac-Agawam general soil map unit (Soil Survey of New London County, Conneticut 1983). Note that these diagrams may be from multiple survey areas. This is still a work in progress.Ĭlick a link below to display the diagram. Clearly there are a lot of assumptions baked into this kind of monthly water balance. Soil moisture state can be roughly interpreted as “dry” when storage is depleted, “moist” when storage is between 0mm and AWC, and “wet” when there is a surplus. Note that this representation of “water storage” is based on the average ability of most plants to extract soil water between 15 bar (“permanent wilting point”) and 1/3 bar (“field capacity”) matric potential. Representative water storage values (“AWC” in the figures) were derived from SSURGO by taking the 50th percentile of profile-total water storage ( sum) for each soil series. 
These (and other) climatic parameters are calculated with each SSURGO refresh and provided by the fetchOSD function of the soilDB package. Monthly PET values were estimated using the method of Thornthwaite (1948).
Rippowam ib series#
Monthly precipitation (PPT) and potential evapotranspiration (PET) have been estimated from the 50th percentile of gridded values (PRISM 1981-2010) overlapping with the extent of SSURGO map units containing each series as a major component. Monthly water balance estimated using a leaky-bucket style model for the RIPPOWAM soil series.
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