A detailed study to generate the new normal baseline data has been carried out during nationwide lockdown (May 12 to May 16, 2020) covering sampling for ambient air, coastal water, coastal sediments, fish and bioaccumulation of heavy metals, in an around Alang, the world’s biggest ship recycling yard. The lockdown data were compared with 2018 and 2019 observed data. PM₁₀ values during lockdown were reduced by 3.75 to 4.5 times as compared with previous 2 years. Similarly, four-fold reduction of PM_2.5 and SPM values was observed during lockdown. The gaseous pollutants like NO₂ and O₃ are within safe limit. Overall air quality index (AQI) improved significantly during lockdown. Similarly, there was drastic reduction in the majority of the nutrient parameters in the coastal water. Different heavy metal concentration in the coastal sediments samples also showed strong reduction during lockdown sampling in comparison with other two sampling. This proves that the coastal environment has its efficient self-cleaning potentials if there is considerable reduction in the anthropogenic as well as industrial activities. Diversity of phytoplankton and zooplankton also increased. The results were validated using statistical techniques like analysis of variance and least significance difference (LSD).

在全国封锁期间（2020年5月12日至5月16日）进行了一项详细研究，以生成新的正常基线数据，涵盖阿朗周围的环境空气、沿海水、沿海沉积物、鱼类和重金属生物累积采样，世界上最大的船舶回收场。将锁定数据与 2018 年和 2019 年观察到的数据进行了比较。封城期间PM ₁₀值比前两年下降了 3.75 至 4.5 倍。同样，在封锁期间， PM _2.5和 SPM 值降低了四倍。_{NO 2}、O ₃等气态污染物均在安全范围内。封锁期间总体空气质量指数（AQI）显着改善。同样，沿海水域的大部分营养参数也急剧下降。与其他两次采样相比，封锁采样期间沿海沉积物样品中的不同重金属浓度也显示出明显的降低。这证明，如果人类活动和工业活动大幅减少，沿海环境具有有效的自清洁潜力。浮游植物和浮游动物的多样性也有所增加。使用方差分析和最小显着性差异 (LSD) 等统计技术对结果进行验证。