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Urbanization and its impact on groundwater: a remote sensing and GIS-based assessment approach 总被引:1,自引:0,他引:1
The perils of unplanned urbanization and increasing pressure of human activities on hydro-geomorphologic system often result
in modification of the existing recharge mechanism, which leads to many environmental consequences. In the present research,
an attempt has been made to investigate the applicability of remote sensing and geographical information system (GIS) in dealing
with spatial and temporal variability of dynamic phenomena, like urbanization and its impact on groundwater. This paper covers
primarily, quantitative and qualitative impacts of urban growth on the behavior of aquifer in Ajmer city (India). Urban growth
of the Ajmer city in last 17 years has been estimated from the satellite images. Database related to urbanization and groundwater
has been created in GIS. Groundwater recharge has been computed using a water balance approach known as Water Level Fluctuation
Methodology. Recharge estimation methodology has been implemented in GIS to introduce the spatial variability of hydro-geological
characteristics. Further, temporal and spatial variations in groundwater quality and quantity have been correlated with urban
growth using overlay analysis in GIS. The study reveals a general decline in water table and quality with urbanization. Further,
remote sensing and GIS technologies have been found useful in assessment of spatial and temporal phenomena of urbanization
and its impact on groundwater system. 相似文献
2.
R L Jat Pramod Jha M L Dotaniya B L Lakaria I Rashmi B P Meena A O Shirale A L Meena 《Environmental monitoring and assessment》2018,190(7):439
Selection of appropriate residue application method is essential for better use of biomass for soil and environmental health improvement. A laboratory incubation experiment was conducted for 75 days to investigate C and N mineralization of residues of soybean (Glycine max L.), chickpea (Cicer arietinum L.), maize (Zea mays L.), and wheat (Triticum aestivum L.) placed on the soil surface and incorporated into the soil. The residue of soybean and chickpea had a greater decomposition rate than that of maize and wheat, despite of their placements. Higher rate of decomposition of the residue of soybean and chickpea was recorded when it was kept on the soil surface while soil incorporation of residue of wheat and maize resulted in faster decomposition. Therefore, these findings could be used as guidelines for management of crop residue application in farmland to improve soil and environmental quality. 相似文献
3.
Increasing salinity is one of the most significant and widespread forms of groundwater pollution in coastal areas. This paper
presents the causes and impacts of saline water intrusion in coastal areas. Various causes of salt water intrusion, and approaches
for the determination of its extent and various measures to control the salt water intrusion are described. An aquifer performance
test (APT) approach is presented to identify the extent of existing salt water intrusion in the study area located in the
southwest coastal region of Gujarat State (India). A resistivity based experimental technique is used to identify the quality
of the groundwater available at different depths. A methodology is presented to assess the extent of available fresh and saline
groundwater and to find out the limit up to which lower saline groundwater can be withdrawn for industrial purposes without
affecting the upper fresh water layer which can be made available for domestic purposes. 相似文献
4.
Vaishali Ashok Tarun Gupta Shefali Dubey Rajmal Jat 《Environmental monitoring and assessment》2014,186(2):735-750
This study characterizes the exposure of a typical Indian Institute of Technology Kanpur student to particulate matter and gaseous co-pollutants like carbon monoxide, volatile organic compounds, and nitrogen dioxide in various microenvironments, within and outside the college campus. Chemical analysis of filter, used for the particulate matter measurement, was also carried out to determine the concentration of various elements such as Ca, Cd, Cr, Cu, Fe, Mg, Pb, Zn, and anions like F?, Cl?, NO3 ?, and SO4 2?. Furthermore, time activity diary along with temperature data was maintained for the precise evaluation and analysis of results for various microenvironments. The results showed PM10 and PM2.5 concentrations to be higher at some outdoor microenvironments, particularly near the Ganga riverbank. From the chemical analysis, concentrations of chloride and fluoride were found higher in indoor microenvironments as compared to outdoors. Also, nitrate concentrations were quite higher within the laboratory premises. Concentrations of Ca, Fe, and Mg were significant outdoors, whereas Na, Ca, Fe, and K were prominent indoors. The study highlights the real-time personal exposure of a student cohort to various toxic pollutants typically found within their breathing levels and their potential sources both indoors and outdoors. 相似文献
5.
J. Jai Devi Tarun Gupta Rajmal Jat S. N. Tripathi 《Environmental science and pollution research international》2013,20(3):1632-1648
Personal exposure measurement can serve as an effective tool to understand the effect of exposure to air pollutants. Alternatively, exposure assessment using pollutant concentrations in different microenvironments and accurate time–activity information for the subjects can provide good information regarding human integrated exposure. A panel of 18 healthy students of Indian Institute of Technology (IIT) Kanpur in the age group of 18 to 30 years participated in the personal exposure measurements for particulate matter, CO, NO2 and VOC during post-monsoon and pre-monsoon seasons. Overall, 432 h person exposure data was collected in this study. The major sources of particulate and gaseous co-pollutants were identified. These directly obtained personal exposure values were then compared to the indirectly estimated integrated exposure values. Personal and integrated exposures gave statistically similar results. Through this study, we have shown that integrated exposure values could closely estimate the personal exposure values for particulate matter that can significantly reduce time and cost involved in personal exposure studies. The lung parameters for all the subjects measured during the pre-monsoon and post-monsoon seasons showed statistically significant reduction during pre-monsoon. This was attributed to the high levels of coarse particles during pre-monsoon. 相似文献
6.
Aryal Jeetendra Prakash Sapkota Tek Bahadur Krupnik Timothy J. Rahut Dil Bahadur Jat Mangi Lal Stirling Clare M. 《Environmental science and pollution research international》2021,28(37):51480-51496
Environmental Science and Pollution Research - Fertilizer, though one of the most essential inputs for increasing agricultural production, is a leading cause of nitrous oxide emissions from... 相似文献
7.
Aryal Jeetendra Prakash Sapkota Tek Bahadur Rahut Dil Bahadur Krupnik Timothy J. Shahrin Sumona Jat M. L. Stirling Clare M. 《Environmental management》2020,66(1):105-120
Environmental Management - Rural households in South Asia’s coastal deltas face numerous livelihood challenges, including risks posed by climatic variability and extreme weather events. This... 相似文献
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