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Wetland Delineation Process

Hydrology. Is standing water or tidal water present?How does water move through the soil and is water stored in the soil?. Very poorly drained

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Wetland Delineation Process

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    1. Wetland Delineation Process Hydrology, Soil, and Plants

    2. Hydrology Is standing water or tidal water present? How does water move through the soil and is water stored in the soil? Very poorly drained – water is at or near the surface; internal water is permanent Poorly drained – soil is wet at shallow depths; internal water is common to permanent Drained – water moves through the soil; internal water is very deep

    3. Soils Microbes use oxygen when they convert carbon to energy. When the soil is saturated or near saturated, oxygen in the soil and dissolved oxygen in the water are rapidly depleted. In an anoxic (without oxygen) environment, the microbes use the oxidized forms of N, Mn, FE, S and C . This leaves only the reduced forms of these elements behind. Basically the soil is rusting and de-rusting.

    4. Soil Color as an Indicator Gleyed Soil – Soil that has been saturated for long periods of time and the iron and manganese have been reduced (de-rusted). Soils appear bluish, greenish, or grayish in color. Mottled Soil – Soil that are saturated but not long enough to become gleyed. This means the water table line is fluctuating. The soil appears spotted.

    5. Munsell Color System 7.5YR2.5/3 7.5YR is the HUE – YR refers to the colors yellow to red. The number can range from 0 to 10. As the number increases the hue becomes more yellow and less red. 2.5 is the VALUE – This refers to the lightness or darkness of a color. (0 is black and 10 is white) 3 is the CHROMA – This is the purity of the hue. (0 Means no pigment added. The max. is 8)

    6. Gleyed Soil Hue – N, GY, G, B Mottled Soil Chroma of 2 or less Spots or rust

    7. Perpendicular to Stream

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