This engineering project has the objective to study and design of the tower to finance hydro dynamic feature of Rock River pebbles mik, white and stone equations of gravel river. By studying the colour khaoklom the river bed diameter 5, 10 and 20 mm Packed bed is tested using a bellows blowing air through the river bed and calculate the value of a feature through hydro dynamic mik. The calculation and experiment found that 1.) small stone to Plum Stone with less than 2 large) small stones to make ingress coefficients is less than a large rock, because it is a small stone with less large stones prunes. 3. small stone) is a pressure decrease over large rocks, small stones, because it is less large stones made of prunes, wind through small stones will pass less than a large rock, it's a lot of pressure reduction occurs 4.), a linear regression analysis, multiples of the permeation coefficients variables used in the prediction equations are as follows:ตัวแปรหลัก D มีค่าสัมประสิทธิ์เท่ากับ 2.834x10-7 ตัวแปรหลัก v มีค่าสัมประสิทธิ์เท่ากับ -1.043x10-9 จุดตัดมีค่าสัมประสิทธิ์เท่ากับ 2.501x10-9สรุปสมการพยากรณ์ได้ดังนี้ k = (2.834x10-7 x D)-(1.043 x 10-9 x v) + 2.501x10-9
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