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Contamination Assessment and Site management Tool or CAST

CAST is a browser based model applications for the assessment of contaminated sites, specially for BTEX-type contaminations. The most important objective of the CAST is to provide an easy interface for exploring sites, such that a preliminary decision on site-assessment can be made. CAST at the current stage targets sites that has never been assessed of risks they pose- e.g., Potentially Contaminated Sites.

The specific highlight of CAST is the online application accessible from www.cast.iitd.ac.in. The online application restricts the range of input values to ensure that computations are possible also when the internet connectivity are weak. The offline version have no such restrictions.

Citation of CAST

To be provided later...,

Open-source code and license terms

The CAST codes are open-sourced and are licensed under Creative Commons CC BY-SA 4.0. Please check here for license wordings.

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CAST codes are hosted in Github, and can be obtained from: here

Non-resposibility Declaration

Authors and organizations of CAST can not be held responsible for any results or output obtained from using the website or the codes provided here

CAST Code development and Models

Flask micro web-framework is used for the web-application development. The front end of the CAST has been designed using HTML, CSS and bootstrap. The back-end is being handled by the open-source management systems: MySQL and Python(3.6.8).

The CAST code structure can be visualized from the following flowchart:

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The CAST flowchart

CAST is a work under progress, as such not all its components, called Toolboxes are already implemented. Furthermore, the models within the toolbox or the applicable function and interactivity are currently quite limited. However, as is also described below, the current state of CAST can already be considered as a useful application. The toolboxes of CAST can be seen in the following figure.

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The main page of CAST

The Toolboxes of CAST provides the applicable functionalities. Each toolbox and the available functions are detailed in successive chapters of this documentation. Here a very brief overview of the CAST toolboxes is presented.

Data toolbox

The database toolbox can be considered as the starting point of using CAST. The toolbox let user quantitatively understand actual contaminated sites. The important sites quantities, their ranges etc are part of this toolbox. In addition to the available (non-modifiable) data, user can also include their own data and compare and visualize them. The database toolbox chapter details extensively the Data toolbox chapter of CAST.

  • Large contaminated site database (100+ sites)
  • Statistical measures and visualizations of important site quantities
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The plots from Database toolbox

Analytical models toolbox

The toolbox currently contains 5 analytical models including the widely used version of BIOSCREEN model called BIOSCREEN-AT. The included models (see analytical model chapter) for more details individually) in the current version of CAST are:

  • 2D Vertical Model (Liedl et al., 2005)
  • 2D Horizontal Model (Ham et al. 2005, Chu et al., 2005)
  • 3D Model (Liedl et al., 2011)
  • 3D Model (BIOSCREEN-AT, Karanovic et al., 2007)
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Analytical models in analytical model toolbox

Empirical models for toolbox

There are only limited Empirical models available. The CAST empirical toolbox contains the following models (see empirical model chapter for details):

  • 2D Vertical (Maier and Grathwohl, 2005)
  • 2D Vertical with richarge (Birla et al. 2020)
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Empirical models in empirical model toolbox

Numerical model toolbox

Numerical model is widely used for site assessment. However, this model type is used for more comprehenisve site assessment works. On the other hand, CAST focuses on intial assessment of sites. Therefore, a very simple numerical model based on MODFLOW and MT3D-MS with very limited function is part of the CAST. More details of the numerical model is provided in numerical model Chapter.

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Numerical model in numerical model toolbox

Decision model for selection of model for site-assessment

This toolbox is not still implemented in CAST.

Online deployment of CAST

  • The online application of CAST (www.cast.iitd.ac.in) has its storage on Baadal, which is a cloud orchestration and virtualization management software developed at Indian Institute of Technology Delhi (IITD).

  • It has been deployed on an Ubuntu 16.04 server with 2 CPU, 4GB RAM and 80GB HDD.

The development organization and members

CAST has received support from researchers and facilities of Indian Institute of Technology Delhi (IITD), Dresden University of Technology (TUD), Manipal University Jaipur (MUJ), and University of Texas at Austin (UT-Austin).

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The XXXX chapter provide complete details of the developers, researchers and organizations invovled with the CAST.

Funds for the CAST development were obtained from:

  1. Partially through DFG fund (LI 727/29-1)
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  1. Funding through:
    1. Professional Development Fund of Prof B R Chahar
    2. Ministry of Water Resources, Govt of India