Maximum infiltration rate occurs at depths of 10-11 m; depth of 10 m is the most conductive interval. 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. Several methods have been employed to measure the rate of water intake by soils. infiltration rate if only a suitable analysis relating these parameters were available. 2: f = 499.98t 2 -338.8 It + 73.205, R 2 is 0.9977 (3) Sample No. A typical method of Infiltration Rate Calculation is given below. Therefore there was no strong correlation with the line of best fit. Decisions to defer ventilation or plan a heating and cooling schedule require a knowledge of upcoming occupancy patterns. It is important that Infiltration Rates are tested before a Soakaway design is completed. t is time from beginning of rainfall and K is a constant. Field measurement of infiltration is often a tedious task and the infiltration rates can be estimated from the proposed models. 5 | P a g e Abstract Infiltration is a process that continuously affects the magnitude and distribution of surface runoff. 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. Determining the rate at which water can move through the soil filling up the soil reservoir can be done with an infiltration test. 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. Graph of infiltration rates versus time for sample No. Typical values for the Infiltration Rate of soils area given here, though these are indicative only. Figure 5.6.3 Graph plot between various infiltration rate versus time for 60cm-ring . 1: (80% Fine, 20% Coarse) Sample No. 0 10 20 30 40 50 02 46 8 10 12 head (-cm) infiltration (mm/h) plot 1 plot 2 plot 3 Figure 1. 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). Infiltration Rate Calculation. Soils that are fine-textured such as clay and clay loam have poor infiltration. These include (1) sprinkling infiltrometers and (2) flooding methods using cylinder infiltrometers, furrow, or basins (Al-Qinna and Abu-Awwad., 1998). Infiltration rate showed close correlation with the hydraulic conductivity. infiltration rates on plot 2 were consistently higher than the other 2 plots.