This engineering project is aimed at studying the way hydro dynamic features, mik, and design of experiments to determine the general equation of the White River Rock pebbles. By studying the colour khaoklom the river bed diameter 5, 10 and 20 mm Packed bed is tested using a bellows blowing wind through River gravel stones. The trial comes to calculate the performance features alternative hydro dynamic mik is the density of gravel river bed of the river focus on prunes pressure flow rate falls straddle and ingress of river pebbles from the calculation and experiments showed that 1.) small stone to Plum Stone with less electricity for size.2. Stone ่) is small, allows coefficients ingress is less than a large rock, because it is a small stone with prunes that are less than 3 large stones) 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. From the experimental data analysis linear regression coefficient values of multiples ingress variable 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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