The faster water moves through the soil profile without pending or running off the surface, generally the less organic matter is in the soil absorbing and holding water. 1: (80% Fine, 20% Coarse) Sample No. These include (1) sprinkling infiltrometers and (2) flooding methods using cylinder infiltrometers, furrow, or basins (Al-Qinna and Abu-Awwad., 1998). Soils that are fine-textured such as clay and clay loam have poor infiltration. 2: f = 499.98t 2 -338.8 It + 73.205, R 2 is 0.9977 (3) Sample No. Infiltration Rate Calculation. Determining the rate at which water can move through the soil filling up the soil reservoir can be done with an infiltration test. A typical method of Infiltration Rate Calculation is given below. 5 | P a g e Abstract Infiltration is a process that continuously affects the magnitude and distribution of surface runoff. infiltration rate if only a suitable analysis relating these parameters were available. Field measurement of infiltration is often a tedious task and the infiltration rates can be estimated from the proposed models. The rates from the 10 and 5 cm tensions for plots 1 and 3 are similar; however, the fitted curve for plot 3 is flatter and there is an increased difference as the tension decreases. The natural infiltration rate is required to determine the current CO 2 generation rate and to predict future CO 2 concentrations. Figure 5.6.3 Graph plot between various infiltration rate versus time for 60cm-ring . 0 10 20 30 40 50 02 46 8 10 12 head (-cm) infiltration (mm/h) plot 1 plot 2 plot 3 Figure 1. It is important that Infiltration Rates are tested before a Soakaway design is completed. f o is infiltration rate at the beginning of storm.. f c is constant infiltration rate which is achieved after the soil profile becomes saturated.. e is base of natural logarithms (Napierian base). Graph of infiltration rates versus time for sample No. Therefore there was no strong correlation with the line of best fit. Several methods have been employed to measure the rate of water intake by soils. infiltration rates on plot 2 were consistently higher than the other 2 plots. Maximum infiltration rate occurs at depths of 10-11 m; depth of 10 m is the most conductive interval. Decisions to defer ventilation or plan a heating and cooling schedule require a knowledge of upcoming occupancy patterns. t is time from beginning of rainfall and K is a constant. Typical values for the Infiltration Rate of soils area given here, though these are indicative only. Infiltration rate showed close correlation with the hydraulic conductivity. Although from fig 2 my graph shows that the rate of infiltration didn’t decrease as much as we expected, because some of the graph points were very scattered as anomalies.