دانلود مقاله ترجمه شده استفاده از مدل HELP در طراحی سیستم زهکشی در محل دفن زباله

The US EPA’s HELP (Hydraulic Evaluation of Landfill Performance) model is by far the most used tool for analyzing water balance in landfill lining and capping systems. However, a proper simulation of geocomposite lateral drainage layers in the HELP Model is not well established. A misinterpretation of the model’s output results can lead to an unsafe design of the drainage systems in landfills. A parametric study was conducted to show the importance of using measured geocomposite properties -versus default ones- as input values and their effect on the estimated amount of lateral drainage and the head on the liner as presented in the model’s output. It was demonstrated that the maximum head on the liner, as calculated by McEnroe’s equation, is valid only when it lies within the thickness of the geocomposite. A design example is presented to demonstrate the proper use and interpretation of HELP model input and output data. Also, the effect of incorporating updated weather data was investigated