National Institute of Technology Durgapur, Durgapur, India.
International Water Management Institute, Colombo, Sri Lanka.
Environ Monit Assess. 2022 Mar 14;194(4):276. doi: 10.1007/s10661-022-09878-w.
Kolkata being a metropolitan city in India has its main municipal solid waste dumpsite situated at Dhapa just adjacent to the East Kolkata Wetlands (Ramsar site). The current prevalent situation at Dhapa is open dumping leading to various contaminations and hazards putting forth the need to look for alternative sites where the landfiilling operation can be shifted to using scientific methods. A user interface (UI)-based analytical hierarchy process (AHP) tool has been developed within the Google Earth Engine (GEE) cloud platform to find out the alternative dumping sites using geospatial layers. AHP function is not available as a native algorithm or developed by any researcher in GEE. The tool has three major functionalities, of which the first one handles the UI elements. The AHP procedure is within another function, and the last function integrates the AHP coefficients to the layers generating the final suitability layer. Users can also upload comparison matrix as GEE asset in the form of CSV file which gets automatically integrated into the AHP to calculate the coefficients and consistency ratio to generate the spatial suitability layers. This approach showcases a generalized AHP function within the GEE environment, which has been done for the first time. The tool is designed in the cloud platform which is dynamic, robust and suitable for use in various AHP-based suitability analysis in environmental monitoring and assessment.
加尔各答是印度的一个大都市，其主要的城市固体废物倾倒场位于达帕，就在东加尔各答湿地（拉姆萨尔湿地）旁边。目前达帕的情况是露天倾倒，导致各种污染和危害，因此需要寻找替代场地，以便可以使用科学方法进行垃圾填埋作业。在谷歌地球引擎（GEE）云平台内开发了一个基于用户界面（UI）的层次分析法（AHP）工具，利用地理空间图层找出替代倾倒场地。AHP 功能不是 GEE 中的本地算法或任何研究人员开发的。该工具具有三个主要功能，其中第一个功能处理 UI 元素。AHP 过程在另一个功能内，最后一个功能将 AHP 系数集成到生成最终适宜性图层的图层中。用户还可以上传比较矩阵作为 GEE 资产，以 CSV 文件的形式上传，该文件会自动集成到 AHP 中，以计算系数和一致性比率，生成空间适宜性图层。这种方法在 GEE 环境中展示了一个通用的 AHP 函数，这是首次实现。该工具是在云平台上设计的，该平台具有动态性、稳健性，适合在环境监测和评估中的各种基于 AHP 的适宜性分析中使用。
