Download Computer Systems and Water Resources by George Bugliarello and Fred Gunther (Eds.) PDF

By George Bugliarello and Fred Gunther (Eds.)

The edited court cases of this convention are released in volumes, and comprise papers written by way of authors from greater than twenty nations. Advances in either computational concept and functions are stated, and a large choice of difficulties in floor and sub-surface hydrology are addressed.

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T h e two methods yield similar estimates of both mean travel time a n d t h e variance of travel time. T h e magnitude of the estimated variance is consistent with the error bound for t h e observed travel time. While t h e Latin hypercube method only yields an estimate of t h e travel. time variance, t h e contribution of the uncertainty in the various parameters t o t h e uncertainty in t h e travel time are given in the moment 31 method. These values are also given in Table 2. The results indicate that the hydraulic conductivity for the till and landfill contribute little t o the uncertainty of the travel time.

5. The travel time weight was assigned a value of 0 . 5 . For the sand zone, a change of the hydraulic conductivity by 1%results in a significant degradation of the objective function, ( 5 ) . A change of 10% in the infiltration value for the eastern zone also results in a degradation of the results. The estimated head distribution corresponding to the parameters of Table 1 is depicted in Figure 3. The travel path from the landfill is shown on Figure 1. 3 years. L. Table l b 1 2 i 950 22 9 1 365 3 65 T h e uncertainty in t h e estimated travel time for groundwater flowing from t h e landfill t o a point below A in Figure 1 was calculated using both the moment method described in a preceding section a n d the Latin hypercube method.

The travel path from the landfill is shown on Figure 1. 3 years. L. Table l b 1 2 i 950 22 9 1 365 3 65 T h e uncertainty in t h e estimated travel time for groundwater flowing from t h e landfill t o a point below A in Figure 1 was calculated using both the moment method described in a preceding section a n d the Latin hypercube method. For the latter, the pdfs for hydraulic conductivity a n d infiltration were divided into 50 intervals of equal probability. It is assumed t h a t t h e uncertainty in travel time is a result of uncertainty in hydraulic conductivity and infiltration only.

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