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• POLLUTE 是一款快速，准确，全面的污染物运移分析软件，新版本为7.13。 POLLUTE被广泛用于垃圾填埋设计和环境补救领域，它具备快速、准确和全面的污染物运动的分析能力，可将一个 1.5 维度的解决方案运用到对流 - 扩散方程中。与有限元和有限差方程不同的是，POLLUTE不需要时间推进步骤，因此既降低了计算工作量，又避免了替代数值不稳定问题的产生。
• 主要特性：
• 1、非线性吸附作用；
• 2、反射性和生物过程的腐烂；
• 3、通过断面的传输；
• 4、被动沉降，相变；
• 5、随时间变化的特性。
• 可以使用程序向导或通过选择许多预先创建的模型中的一个来从头开始创建模型：例如，主衬垫填埋场和次衬垫填埋场。垂直迁移和水平迁移。
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• POLLUTE V7的一些功能：
• 使用空白模型，向导或快速输入模型可以轻松创建新模型。
• 模型的图形图在创建时显示
• 模型可包含200个图层
• 层可包含1,2或3维裂缝
• 可以为每个层指定扩散系数，分配系数和相变参数
• 顶部边界条件可以是灵通量，恒定浓度或有限质量
• 底部边界条件可以是零通量，恒定浓度，固定流出或无限厚度
• 地下浓度可以在指定的时间计算，或者程序可以自动找到大浓度的时间
• 可以模拟污染物的放射性或生物衰变
• 可以指定在指定深度处的初始浓度分布
• 可以模拟Freundlich和Langmuir非线性吸附
• 源，速度和图层属性可以随时间变化（可以使用源，障碍或流模式中的模型更改）
• 可以指定一个或多个被动水槽来模拟层中的水平速度和污染物的去除
• 蒙特卡罗模拟可用于评估模型参数的不确定性的影响
• 当参数值未准确知晓时，灵敏度分析可用于预测预期的浓度范围
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• 英文介绍
  
• POLLUTEv7 program provides fast, accurate, and comprehensive contaminant migration analysis capabilities. This program implements a one and a half dimensional solution to the advection-dispersion equation. Unlike finite element and finite difference formulations, POLLUTEv7 does not require a time-marching procedure, and thus involves relatively little computational effort while also avoiding the numerical problems of alternate approaches.
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• With more then fifteen years utilization in industry, POLLUTEv7 is a well tested contaminant migration analysis program which is widely used in landfill design and remediation. Landfill designs that can be considered range from simple systems on a natural clayey aquitard to composite liners, multiple barriers and multiple aquifers.
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• In addition to advective-dispersive transport, POLLUTEv7 can consider
• · non-linear sorption
• · radioactive and biological decay
• · transport through fractures
• · passive sinks
• · phase changes, and
• · time-varying properties.
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• Feature Comparison
• Feature
• Professional
• Standard
• Wizards and pre-created models
• Yes
• Yes
• Unlimited number of models
• Yes
• Yes
• Up to 200 layers
• Yes
• Yes
• Constant concentration boundary conditions
• Yes
• Yes
• Finite mass boundary condition
• Yes
• Yes
• Fixed outflow boundary condition
• Yes
• Yes
• Passive Sinks
• Yes
• Yes
• Linear sorption
• Yes
• Yes
• Non-linear sorption
• Yes
• No
• Fractures in layers
• Yes
• No
• Radioactive and biological decay
• Yes
• No
• Initial concentration profile
• Yes
• No
• Time-varying properties
• Yes
• No
• Monte Carlo Simulation
• Yes
• Yes
• Sensitivity Analysis
• Yes
• Yes
• POLLUTE Data Entry
• Using the main menu bar at the top of the screen, datasets can be created, edited, and executed. The output from these datasets can then be displayed and printed.
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• POLLUTE Deposit Data
• Datasets can be created or edited using the Data Menu. A dataset consists of general deposit data, layer data, boundary conditions, and optional special features.
• First, general data is entered about the model, such as:
• · Title of the Dataset
• · Number of Soil Layers (each layer can have different properties)
• · Darcy Velocity through the soil layers
• · Laplace Transform Parameters (defaults are usually sufficient)
• POLLUTE Layer Data
• For each layer, the following may be specified:
• · Number of Sublayers
• · Thickness
• · Dry Density
• · Coefficient of Hydrodynamic Dispersion
• · Distribution Coefficient
• · Type of Fractures (if present)
• Any or all of the layers may be fractured. These fractures may be one, two, or three dimensional. In a fractured layer, the program considers advective-dispersive transport along the fractures coupled with diffusion into the matrix on either side of the fracture
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• POLLUTE Boundary Conditions
• There are two boundaries for each dataset, one at the top and one at the bottom of the layers. The top boundary is usually the point of contact with the contaminant source (finite mass or constant concentration), and the bottom boundary is usually the point of contact with an aquifer (fixed outflow) or bedrock (zero flux).
• Finite Mass Boundary Condition
• The finite mass boundary condition may be used to represent contaminant sources such as landfills. Where the mass of contaminant is finite, the concentration of contaminant at the source will decline as contaminant mass is transported into the layers below or is removed by a leachate collection system.
• Fixed Outflow Velocity Boundary Condition
• This boundary condition may be used to represent an aquifer below the layers in the dataset. The concentration in this aquifer will vary with time as mass is transported into the aquifer from the layers above and is then transported away by the horizontal velocity in the base strata.
• POLLUTE Special Features
• In addition to the basic data parameters, many special features can also be used in the model. One or more of these special features may be selected from the multiple choice menu.
• Radioactive/Biological Decay
• Radioactive or biological decay can be modeled. First-order decay is considered by specifying the half lives for the source, layers, and base aquifer. The layers may have the same half-life, or the half-life can be specified as a function of depth.
• Depth Interval Concentration Profile
• To model background concentration in the layers, an initial concentration profile may be used. Using this option, the initial concentration in the layers can be specified as a function of depth. In addition, the flux into the soil and the base can be specified at the start time of the model.
• Freundlich and Langmuir Nonlinear Sorption
• Either Freundlich or Langmuir nonlinear sorption may be considered. When nonlinear sorption is used, the program splits the layers into sublayers and uses an iterative technique to determine the equivalent linear distribution coefficient for each sublayer.
• Properties Increment Within Groups
• This option is used to vary properties of the model with time. The user may vary the source concentration, contaminant mass, volume of leachate collected, Darcy velocity, dispersivity and aquifer velocity. For example, this option can be used to simulate the progressive failure of the leachate collection system in a landfill. Time is divided into groups. In each group the properties may be constant with time or may increment linearly with time. The concentration in the source at the beginning of each time group may be specified or the concentration at the end of the last group may be used.
• Passive Sink
• One or more passive sinks may be used in the model. A passive sink is a layer where there is a horizontal velocity. This will have the effect of removing contaminants. Typically, a passive sink is used to represent secondary leachate collection systems or multiple aquifers.
• Monte Carlo Variable Entry
• Monte Carlo simulation may be used to evaluate the effects of uncertainty in the values of some of the model data. Using this approach, the uncertain data values are described using a probability distribution. After numerous simulations, a probability distribution is generated for the peak concentration of the contaminant at any depth.
• Primary Liner (Subtitle D) Landfill
• There are options to create and customize predefined models quickly and easily. These models include landfills with primary leachate collection and composite liners (Subtitle D).
• Primary and Secondary Liner Landfill
• There are options to create and customize predefined models quickly and easily. These models include landfills with primary leachate collection and composite liners (Subtitle D) and landfills with primary and secondary leachate collection and composite liners (Subtitle C). In these quick landfill entry options, layers such as the geomembrane, clay liner, aquitard, and aquifer can be included or discarded simply by the selecting Yes or No beside the layer name.
• Leakage Rate (Subtitle D) Landfill
• The leakage rate through the composite liner may be calculated using the method proposed by Giroud et al., 1992, and Giroud and Bonaparte, 1989. These calculations consider leakage due to permeation and defects in the geomembrane.
• Geomembrane Hole Data
• In addition to the type of contact between the geomembrane and the clay liner, the leakage will also depend on the type, size, and frequency of the defects.
• Finite Mass Source
• The landfill contaminant source can be either finite mass or constant concentration. If the source type is finite mass, the waste thickness and density, infiltration through the cover, and percentage of mass can be specified for the contaminant.
• Primary Clay Liner or GCL
• For each layer present in the model, the parameters may be specified in any units; the program will automatically convert all units to either SI or US. The liner can be either clay or a geosynthetic clay liner.
• Aquifer
• If an aquifer is present beneath the landfill, the thickness and porosity of the aquifer can be specified. The program will automatically calculate the minimum outflow velocity in the aquifer. This value or a higher value can be specified.
• POLLUTE Model Execution
• Calculate Concentrations
• After the dataset has been created, the model can be executed. The concentration of the contaminant can be calculated at any number of specific depths or the maximum concentration can be determined automatically at any selected depth. Unlike other techniques that may take hours or days to prepare and execute models, the finite-layer technique is very quick. It typically takes only minutes to prepare and execute a model making it ideal for examining design alternatives and for sensitivity analysis.
• POLLUTE Result Output
• After the model has been executed, the output file can be displayed, graphed, and printed. Graphs can be concentration versus time, concentration versus depth, flux versus time, and color concentration. All of these graphs can also be easily printed on several types of printers. Default values for the graphs are automatically determined. These values can be easily changed to allow complete customization of the graph. For the concentration versus time graph, one or all of the depths may be plotted; likewise for time in the concentration versus depth graph.
• Concentration Versus Time
• Concentration with time graphs show the variation in the calculated concentration of the contaminant with time for the depths studied. Using these graphs, the peak concentration at a specific depth can be easily identified. This value is also automatically displayed at the top of the graph.
• Concentration Versus Depth
• Concentration versus depth graphs show the change in contaminant concentration with depth, either for a specific time or for all the times that were calculated.
• Flux Versus Time
• The total flux into the top of the soil layers and out of the bottom of the soil layers with time can be graphed.
• Color Concentration Plot
• The change in concentration with time and depth graph can be used to illustrate the movement of the contaminant plume into deeper depths over time.
• Print Options
• Graphs can be printed by pressing 'P' while they are displayed. Many of the features of the printed graph can be controlled such as the size, titles and fonts.
• POLLUTE Tools
• Tools are available to aid in creating and checking datasets.
• Calculator
• These tools include a calculator that can be used to determine Darcy velocity and contaminant mass.
• Help
• Context-sensitive help can be accessed any time by pressing the F1 key. The information displayed contains many cross-references which can be displayed by clicking on the highlighted text.
• POLLUTE Preferences
• The display colors, mouse buttons, and program environment can all be adjusted as desired. Many of the program features can be customized such as directories, file extensions, screen display type, and printer type.
• Most popular screen types are supported, including Super VGA, VGA, and EGA, or the screen type can be automatically detected.
• A large variety of printers are also supported such as Epson 9 and 24 pin, HP LaserJet, HP Pen Plotters, HP Paint Jet, and Postscript. Graphs can also be converted into PCX file format.