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i <br /> ON <br /> • s <br /> C.=ULATIONS OF ZZATURAL QROUNDWATER VELOCITY <br /> HOLT BROTHERS <br /> 03/05/91 <br /> *MONITORING WELL MW6 <br /> The natural velocity (Vn)of groundwater is calculated au follows <br /> Vn Ki/O where K a T/b, Therefore Vn Ti/b0 <br /> iE <br /> Vn - natural groundwater velocity <br /> K - hydraulic: conductivity - Tb <br /> i 0.001 Q groundwater gradient <br /> 0 estimated effective porosity a •30 <br /> T 2,000 5pd/ft. transmissivity (front pumping test data) <br /> b saturated thickness 10 ft. <br /> Vn (2,000 gpd/ft) (0-001) a 0.566 gpd/ft2 a <br /> (10 ft.) (0.nv) <br /> 0.666 gpd/ft x 0.134 ft dday x 355 days/yr. 32 ft./yr- <br /> gp3 <br /> ity of 200 gpd/ft representing the io<ge <br /> e of <br /> If a transmissivd from the <br /> a � � est i� used, a groundwater <br /> values determine <br /> velocity 3.4 ft/year isciclaed <br /> j <br /> t <br />