Differences

This shows you the differences between two versions of the page.

--- infiltration_guidance [2024/02/07 09:10] – admin
+++ infiltration_guidance [2025/09/30 14:48] (current) – admin
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 This page is intended to provide guidance on infiltration design, modeling and construction, based on approved policy and frequently asked questions.
+:!: The current version of WinSLAMM (10.5.0) overestimates evapotranspiration (ET) volume. Until a fix is implemented, ET may not be turned on in the model. :!:
 =====Site Consideration=====
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   *Removal of up to 5 feet of undesirable material in order to reach appropriate infiltrating soils is expected before attempting to claim an [[infiltration exemptions|exemption]].
-  *Design infiltration rates should be determined using test pits and soil textural classifications from Table 2 of the DNR's Technical Standard [[https://dnr.wi.gov/topic/stormwater/documents/1002SiteEvalForInfiltr.pdf|Site Evaluation for Stormwater Infiltration 1002]]. In-field testing of infiltration rates may be desirable to verify assumed infiltration values.
+  *Design infiltration rates should be determined using test pits and soil textural classifications from Table 2 of the DNR's Technical Standard [[https://dnr.wisconsin.gov/sites/default/files/topic/Stormwater/1002SiteEvalForInfiltr.pdf|Site Evaluation for Stormwater Infiltration 1002]]. In-field testing of infiltration rates may be desirable to verify assumed infiltration values.
   *Topographical depressions exceeding 1 foot in depth and 20,000 square feet in area should be modeled as ponds in the predevelopment model. Smaller depressions should be modeled using the “ponded area” routines in TR55 and similar models.