Lovely Professional University, Jalandhar, Punjab, India.
Environ Sci Pollut Res Int. 2020 May;27(13):15350-15364. doi: 10.1007/s11356-020-08071-1. Epub 2020 Feb 19.
India is bestowed with huge amount of surface water resources. However, India lacks the quality monitoring of surface water and comprehensive management for sustainable surface water development. A new approach for indexing has been proposed to represent pollution due to heavy metals in surface water. Heavy metal pollution indices (m-HPI) for 60 surface water samples in the peninsular stretch were evaluated during pre-drought, drought and post-drought condition. The Index will be represented by a Positive Index (PI) and a Negative Index (NI), where PI represents the level pollution exceeding the maximum desirable limit and NI reflects the index within the required limit. The PI is assigned as 0 when indicators are present below the detection limit or equal to the maximum required limit. However, the value calculated for NI could be 0 to -1 when the indicators are equal to or less than the suggested maximum desirable limit, and the value could be -1 when the indicators are present below the suggested detection limit. The spatiotemporal variation of water quality pattern was studied by the interpolation maps extracted from ArcGIS. The results are compared with WHO standard to validate the drinking water quality. The calculated indices indicated the suitability of water for domestic and irrigation purposes. The developed indexing system is user friendly, robust, flexible and may evaluate the index considering any water quality standard.
印度拥有丰富的地表水资源。然而，印度缺乏对地表水的质量监测以及全面管理，以实现地表水的可持续开发。本文提出了一种新的方法来表示地表水重金属污染。在旱前、旱中和旱后条件下，对印度半岛地区 60 个地表水样本进行了重金属污染指数（m-HPI）评估。该指数将由正指数（PI）和负指数（NI）表示，其中 PI 表示超过最大理想限值的污染水平，NI 反映了在所需限值内的指数。当指标低于检测限或等于最大所需限值时，PI 赋值为 0。然而，当指标等于或小于建议的最大理想限值时，NI 的计算值可以为 0 到-1，当指标低于建议的检测限时，NI 的计算值可以为-1。利用从 ArcGIS 提取的插值图研究了水质模式的时空变化。结果与世界卫生组织（WHO）标准进行了比较，以验证饮用水质量。计算出的指数表明水适合家庭和灌溉用途。开发的索引系统用户友好、稳健、灵活，可以根据任何水质标准评估指数。
