Krishan G, Sudarsan N, Sidhu B S, Vashisth R
National Institute of Hydrology, Roorkee, Uttarakhand India.
PSFC, Mohali, Punjab India.
Sustain Water Resour Manag. 2021;7(3):27. doi: 10.1007/s40899-021-00510-2. Epub 2021 Apr 13.
In the present study, a total of 48 groundwater samples (13 from shallow aquifers depth < 50 m and 35 samples from deep aquifers in the depth range 50-200 m) were collected from three industrial dominant districts (Ludhiana, Jalandhar and Moga) of Punjab after the lockdown period and before the start of southwest monsoon in the month of June, 2020 (pre-monsoon). The values for total dissolved solids (TDS) observed in Monsoon season (August, 2020) and November-December, 2019 (post-monsoon) were compared with the values taken in June, 2020 (pre-monsoon) to see the impact of lockdown due to COVID-19 pandemic on groundwater salinity. ~ 60% of samples were found to have TDS values more than acceptable limit (500 mg/l) before lockdown (post-monsoon season of 2019) period and after or during lockdown period (June, 2020) number of samples more than the acceptable limit (500 mg/l) reduced to 45%. Average TDS values reduced by 25% in shallow aquifers after lockdown and area under TDS values in acceptable limit (500 mg/l) increased by 23% of samples as compared to the TDS values found in monsoon season of year 2019. In deeper aquifers, increase of only 3% area under TDS values in acceptable limit of 500 mg/l was found. Reductions in TDS values in shallow aquifers clearly show that there is an urgent need for proper management of salinity causing elements and regulating these to check groundwater contaminations using the holistic and hydro-geoethical approach.
在本研究中，于2020年6月（季风来临前）封锁期结束后且西南季风开始之前，从旁遮普邦的三个工业主导区（卢迪亚纳、贾朗达尔和莫加）采集了总共48个地下水样本（13个来自深度小于50米的浅层含水层，35个样本来自深度在50 - 200米范围内的深层含水层）。将2020年8月季风季节以及2019年11月至12月（季风过后）观测到的总溶解固体（TDS）值与2020年6月（季风来临前）获取的值进行比较，以查看由于新冠疫情封锁对地下水盐度的影响。在封锁前（2019年季风过后季节），约60%的样本TDS值超过可接受限度（500毫克/升），而在封锁后或封锁期间（2020年6月），超过可接受限度（500毫克/升）的样本数量降至45%。与2019年季风季节发现的TDS值相比，封锁后浅层含水层的平均TDS值降低了25%，TDS值在可接受限度（500毫克/升）内的样本面积增加了23%。在深层含水层中，发现TDS值在500毫克/升可接受限度内的面积仅增加了3%。浅层含水层中TDS值的降低清楚地表明，迫切需要对造成盐度的元素进行适当管理，并采用整体和水文地质伦理方法对其进行调控，以检查地下水污染情况。
