D. S. Malik

Gurukul Kangri Vishwavidyalaya

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Pradip Kumar Maurya

Gurukul Kangri Vishwavidyalaya

Pawan Kumar Bharti

Narendra Dev University of Agriculture and Technology

Umesh Bharti

Panjab University

Vishal Kamboj

Gurukul Kangri Vishwavidyalaya

Amit Kumar Sharma

Central University of Himachal Pradesh

Arvind Kumar Sharma

Gurukul Kangri Vishwavidyalaya

Pawan Kumar

Central University of Jammu

C. K. Jain

National Institute of Hydrology

Ruchika Chauhan

University of KwaZulu-Natal

Varsha Gupta

Chhatrapati Shahu Ji Maharaj University

Cooperative Institutions

Gurukul Kangri Vishwavidyalaya

National Institute of Hydrology

Chhatrapati Shahu Ji Maharaj University

Central University of Himachal Pradesh

Indian Institute of Technology Roorkee

University of Delhi

Govind Ballabh Pant University of Agriculture and Technology

Chaudhary Charan Singh Haryana Agricultural University

Banaras Hindu University

Xinjiang Technical Institute of Physics & Chemistry

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Primary production efficiency in different environmental settings of Sahstradhara hill-stream, Dehradun

Environment Conservation Journal (2005)

Pawan Kumar Bharti D. S. Malik

An investigation was conducted on primary productivity and water quality of Sahastradhra hill-stream for evaluation of aquatic ecosystem status in different environmental settings along with the stream. The factors such as temperature, pH, carbon dioxide and plankton on which primary productivity depends were studied. It was pointed out that the Gross primary productivity showed a negative relationship with temperature, pH and carbon dioxide. The present paper deals with the production efficiency of Sahastradhara hill stream, Dehradun and maximum production efficiency of Sahastradhara stream was found 66.66% at sampling site- III in the month of December 2003, while minimum production efficiency was recorded 20.79% at site- IV during May 2004.

Production efficiency

Primary productivity

Primary (astronomy)

10.36953/ecj.2005.0612317

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Metal Fractionation Study on Bed Sediments of Lake Nainital, Uttaranchal, India

Environmental Monitoring and Assessment (2007)

C. K. Jain D. S. Malik Rashmi Yadav

10.1007/s10661-006-9383-6

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Citations (94)

Heavy metal contamination in river water, sediment, groundwater and human blood, from Kanpur, Uttar Pradesh, India

Environmental Geochemistry and Health (2022)

Varsha Gupta Dinesh Kumar Anamika Dwivedi Umesh Kumar Vishwakarma D. S. Malik

10.1007/s10653-022-01290-0

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Citations (32)

Distribution of heavy metals in water, sediments and fish tissue (Heteropneustis fossilis) in Kali River of western U.P. India

International Journal of Fisheries and Aquatic Studies (2016)

Pradip Kumar Maurya D. S. Malik

The present study the selected heavy metals such as cadmium (Cd), chromium (Cr), lead (Pb), Manganese (Mn) and cooper (Cu) were determined in water, sediment and gill, liver, muscle of fish H. fossilis, the concentration of Cd, Cr, Pb, Cu Mn and Zn was observed 0.009, 0.056, 0.056, 0.058, 0.049, 0.883, 0.36 mg/l in river water and 3.38, 20.11, 81.53, 258.48, 258.48, 3.40 µg/g in sediment respectively. The heavy metals concentrations in the tissue of fish H. fossilis (µg/g dry weight), Cd 30.89, Cr 20.59, Pb 15.28, Cu 30.66 and Zn 26.67 µg/g in muscle, and the Cd 30.89, Pb 15.28, Cr 20.59, Cu 30.66 and Zn 32.42 in gills and Cd 34.44, Cr 18.00, Pb 17.34, Cu31.18 and Zn 58.44 µg/g in liver. The results showed that the liver appeared to the main heavy metals storage tissues, while the muscle of fish was lover accumulator compare than gill and liver. All the metals concentration exceeded the detection limits except than Mn. The results indicated that the selected fish does not feed directly without proper treatment of riverin ecosystem.

Dry weight

Liver tissue

Bioconcentration

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Citations (17)

Anthropogenic Impact on Fish Faunal Diversity and Their Habitat Ecology in the Ganga River and Its Tributaries, Uttarakhand

Springer proceedings in earth and environmental sciences (2022)

D. S. Malik Arvind Kumar Sharma Sunil Kumar Rakesh Kumar Ranjit Kumar

10.1007/978-3-031-05335-1_4

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Citations (9)

Length-weight relationships of coldwater fish species from the different stretches of upper Ganga basin in Garhwal region of Uttarakhand.

Annals of Agri Bio Research (2021)

D. S. Malik ARCHANA SHARMA Vishal Kamboj

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Quality Assessment of Physico- Chemical Properties of Barua Sagar Lake Jhansi Uttar Pradesh, India

International journal of scientific research (2016)

Pradip Kumar Maurya D. S. Malik

This study was aimed to estimate current status of physico-chemical characteristic of Baruasagar lake. Monthly changes in physic-chemical parameters such as water temperature, pH, total dissolved solids, dissolved oxygen, alkalinity, total hardness, calcium, magnesium, chlorides, sodium, biological oxygen demand, manganese, cadmium and lead were analyzed for during January to December from year 2014 to 2015. The results indicated that the parameters of water sample in 2014 under permissible limit except than Cd, Pb and Mn but in 2015, total hardness, Mn, Cd, Pb and Cl were out of permissible limits, due to the burden of agricultural west and human activities.

Alkalinity

Uttar pradesh

Total dissolved solids

Biochemical oxygen demand

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Macro-benthic diversity in relation to biotic indices in Song river at Dehradun, India

Environment Conservation Journal (2010)

D. S. Malik Umesh Bharti Pawan Kumar

The composition and abundance of benthic animals are commonly used as bio-indicators to determine the impact of pollution on physico-chemical integrity of surface waters and changing pattern of biotic characteristics of lentic and lotic system. The benthos serves as a link between primary producers, decomposers and higher trophic level. Song river is a spring fed hill stream originated from different small rivulets of lesser Himalayan mountainous ranges at Garhwal region of Uttarakhand. The study was carried out from 2006-2008, the water samples were collected from three different sites in a stretch of about ten kilometres from Song river. All taxa were identified to species/genus level with the help of identification keys. The 5 faunal groups and 19 genera were observed at three different stations in the Song river. At all three sites, Tubifex was the dominant genera among Oligochaeta. Among polychaeta, Namalycastic indica, Napthys polybranchia, Napthys oligobrunchia species were reported at all above three different sites of Song river. Biotic indices indicated moderate pollution in the water quality of upstream and down stream water. The CCME (Canadian Council of Minister of Environment) water quality index (2001) showed marginal range of pollution in the river. The abundance of pollution tolerant organisms indicated the downstream site is receiving nutrient-rich urban runoff containing little or no toxins substances.

River ecosystem

Biotic index

Lake ecosystem

Diversity index

Benthos

10.36953/ecj.2010.1220

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Citations (2)

Assessment of groundwater quality and its controlling processes in Bemetara District of Chhattisgarh State, India

Applied Water Science (2022)

M. K. Sharma Mohit Kumar D. S. Malik Surjeet Singh A. K. Patre

Abstract Groundwater withdrawal at very fast rate poses threat on existing groundwater resources in different parts of the world. This reduction in groundwater levels significantly disturbed the natural aquifer flow rate and thereby different hydrogeochemical processes, which may further impair the groundwater quality. The groundwater quality in rural area of Chhattisgarh State is degraded, and the problem of saline water poses health risk to people. In this research investigation, suitability of groundwater of Bemetara District, Chhattisgarh, India, has been evaluated for drinking purpose through water quality index (WQI) method and principal component analysis (PCA). Total 116 groundwater samples were collected during the pre-monsoon (June 2019) and post-monsoon season (December 2019) and analyzed for physicochemical parameters. Total dissolved solids ranged from 250 to 10,440 mg/L and 289 to 3583 mg/L during pre-monsoon and post-monsoon, respectively, and 55% of the total samples exceeded acceptable BIS limit in pre-monsoon, while about 66% samples exceeded in post-monsoon season. SO 4 2− concentrations varied from 3 to 5734 mg/L during pre-monsoon and 4.5 to 2002 mg/L during post-monsoon, respectively. Total 28% samples in pre-monsoon and 18% samples in post-monsoon season exceeded the maximum permissible BIS limit (400 mg/L) of SO 4 2− ion in the study area. On the basis of WQI, the quality of groundwater varies from “Excellent water” to “Good water” category. The groundwater of northeastern part of the district is not suitable for drinking, and therefore, it is recommended to treat this groundwater before human consumption with special reference to SO 4 2− contamination. PCA inferred that four components are sufficient to explain the variance in chemistry of groundwater that is mainly governed by dissolution of gypsum mineral, other rock–water interaction and anthropogenic activities. Further, water quality was improved in the direction of groundwater flow in the study area, establishing a direct relationship between groundwater flow and water quality of the Bemetara District. This study provides very useful database to design sustainable groundwater management plan for the district.

10.1007/s13201-022-01608-4

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Citations (14)

Ba₅Y₁₂Zn[O(SiO₄)]₈: a novel non-centrosymmetric silicate with a short ultraviolet cut-off edge featuring [ZnSi₄O₁₆] and [SiO₄] units

New Journal of Chemistry (2024)

Aihaimaitijiang Ababaikeri Xueting Pan Gulimeikereyi Tuniyazi Xiangzhan Jiang Yanhui Zhang

A new silicate Ba 5 Y 12 Zn[O(SiO 4 )] 8 was synthesized by a high-temperature solution method and experimental results show a short cut-off edge of 204 nm, an SHG response (0.3 × KDP), and thermal stability. Meanwhile, the effect of the n M : n Si ratio on the Si–O framework was studied.

Ultraviolet

10.1039/d3nj04480g

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Citations (1)