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Wetland name or number B <br />� �0 <br />71Y>3IL2�Z,0"{�i�r�i71��Z'TOI��v= �dre,�Eorsthat�the,�etla3rc�filp�tfi2netronsto <br />�'�i'f3co� <br />(see p.46j <br />D 3. Does the wetland unit have the potential to reduce flooding and erosion? <br />D <br />D 3.1 Characteristics of surface water flows out of the wettand unit <br />Umt is a depression with no surface water leaving it (no outlet) points = 4 <br />✓ Unit has an intermittently flowing, OR highly constricted permanently flowing outlet points-2 <br />2 <br />nit is a "flat" depression (Q. 7 on key), or in the Flats class, with permanent surface outflow and <br />no obvious natural outlet and/or outlet is a man-made ditch points = i <br />(Ifditchi8notpermanenhyfowingtreat unit as "interminenhyflowing") <br />®Unithas an unconsticted, or sli htly constricted, surface outlet errnaneml owin oints — 0 <br />D <br />D 3.2 Depth of storage during wet periods <br />Estimate the height ofponding above the bottom of the outlet. For units with no outlet <br />measure from the surface ofpermanent water or deepest part (if diy). <br />QMarks of pending are 3 ft or more above the surface or bottom of outlet points = 7 <br />✓The wetland is a "headwater" wetland" points = 5 <br />5 <br />[]Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 <br />[]Marks are at least 0.5 ft to < 2 ft fiom surface or bottom of outlet points = 3 <br />DUnit is flat (yes to Q. 2 or Q, 7 on key) but has small depressions on the surface that trap <br />water points =1 <br />QMarks of ponding less than 0.5 ft points = 0 <br />D <br />D 3.3 Contribution of wetland unit to storage in the watershed <br />Estimate the ratio of the area ofitpstream basin contributing surface water to the wetland <br />to the area of the wetland emit itself. <br />The area of the basin is less than 10 times the area of unit points = 5 <br />3 <br />✓ The area of the basin is 10 to 100 times the area of the unit points = 3 <br />he area of the basin is more than 100 times the area of the unit points = 0 <br />nflre unit is in the FLATS class points = 5 <br />D <br />Total for D 3 Add the points in the boxes above <br />1 10 ® 1 <br />D <br />D 4. Does the wetland unit have the opportunity to reduce flooding and erosion? <br />(seep. 49) <br />Answer XES if the runt is in a location in the watershed where the flood storage, or <br />reduction in water velocity, it provides helps protect downstream property and aquatic <br />resources from flooding or excessive and/or erosive flows. Answer NO if the water <br />coming into the wetland is controlled by a structure such as flood gate, tide gate, flap <br />valve, reset voir etc. OR you estimate that more than 90% of the water in the wettand is <br />from groundwater in areas where damaging groundwater flooding does not occur. <br />Note which of the following indicators of opportani0r apply. <br />[] Wetland is in a headwater of a river or stream that has flooding problems <br />Q Wetland drains to a river or stream that has flooding problems <br />❑ Wetland has no outlet and impounds surface runoff water that might otherwise <br />flow into a river or stream that has flooding problems <br />multiplier <br />❑ Other <br />OYES multi lien is 2 ONO multi lier is f <br />2 <br />D <br />TOTAL - Hydrologic Functions Multiply the score from D 3 by D 4 <br />Add score to table on p. 1 <br />20 <br />Wetland Rating Form —western Washington 6 August 2004 <br />version 2 Updated with new WDFW definitions Oct. 2008 <br />