文章基本信息

标题：Physico-chemical limnology of a shallow lake in the floodplains of western Himalaya from last four decades: present status
本地全文：下载
作者：Javaid Ahmad Shah ; Ashok K. Pandit ; G. Mustafa Shah 等
期刊名称：Environmental Systems Research
电子版ISSN：2193-2697
出版年度：2019
卷号：8
期号：1
页码：1-10
DOI：10.1186/s40068-019-0136-2
语种：English
出版社：Springer
摘要：AbstractBackgroundFrom the last few decades several lakes and wetlands showed water quality degradation that is one of the major problems globally resulting in serious environmental impacts and concern in both aquatic and terrestrial environs.MethodsDuring this study we evaluated a number of water parameters [water temperature, depth, transparency, hydrogen ion concentration (pH), dissolved oxygen, chloride, calcium, magnesium, total alkalinity, nitrogen and phosphorus] on the monthly basis in September 2012–August 2013 in Hokersar wetland.ResultsFrom the year 1978 till 2012–13, the number of parameters showed an increasing trend except for pH and dissolved oxygen. Remarkable temporal variations were recorded in various parameters during the past and present study (e.g. dissolved oxygen showed a decrease of about 2.4 mg/L and pH 0.8 units. Calcium, magnesium, alkalinity, ammonical nitrogen and nitrate nitrogen depicted many fold increase in the last four decades). Among the recorded parameters significant positive correlations were observed between depth and chloride (r = 0.408, p < 0.01); pH and water temperature (r = 0.888, p < 0.05); dissolved oxygen with total alkalinity (r = 0.790, p < 0.05). However, negative correlation were maintained by water temperature with dissolved oxygen (r = 0.894, p < 0.05), free carbon dioxide (r = 0.732, p < 0.05) and calcium content (r = 0.868, p < 0.05).ConclusionThe study reflects that the wetland is under tremendous anthropogenic pressures from the immediate catchment. Further, from the study it is evident that total phosphorus raveled decreased levels as compared to previous years reflecting that the wetland still has spongy capacity for the major nutrient.
关键词：KeywordsEnWetlandDissolved oxygenNitrogenPhosphorusAnthropogenic pressure