Clogging mechanisms and preventive measures in artificial recharge systems  

作　　者：M Shahbaz Akhtar Yoshitaka Nakashima Makoto Nishigaki 

机构地区：[1]Department of Environmental Sciences,Forman Christian College(A Chartered University),Lahore,Pakistan. [2]Department of Environmental Management Engineering,Graduate School of Environmental&Life Science,Okayama University,Okayama,Japan. [3]Geo Environmental Evaluation Lab,Department of Sound Material Cycle Science,Graduate School of Environmental&Life Science,Okayama University,Okayama,Japan. [4]Integration Model of Physical Properties Technology Research Association,Okayama,Japan.

出　　处：《Journal of Groundwater Science and Engineering》2021年第3期181-201,共21页地下水科学与工程（英文版）

摘　　要：The study aims to identify a suitable site for open and bore well in a farmhouseusing ground magnetic survey in south India.It also aims to define depth to granitoid and structural elements which traverse the selected area.Magnetic data(n=84)measured,processed and interpreted as qualitative and quantitatively.The results of total magnetic intensities indicate that the area is composed of linear magnetic lows trending NE-SW direction and circular to semi-circular causative bodies.The magnetic values ranged from-137 nT to 2345 nT with a mean of 465 nT.Reduction to equator shows significant shifting of causative bodies in the southern and northern directions.Analytical signal map shows exact boundary of granitic bodies.Cosine directional filter has brought out structural element trending NE-SW direction.Results of individual profile brought to light structurally weak zone between 90 m and 100 m in all the profile lines.Sudden decrease of magnetic values from 2042 nT to 126 nT noticed in profile line 6 between 20 m and 30 m indicates fault occurrence.Magnetic breaks obtained from these maps were visualized,interpreted and identified two suitable sites for open and bore well.Radially averaged power spectrum estimates depth of shallow and deep sources in 5 m and 50 m,respectively.Euler method has also been applied to estimate depth of granitoid and structural elements using structural indexes 0,1,2,and 3 and found depth ranges from<10 m to>90 m.Study indicates magnetic method is one of the geophysical methods suitable for groundwater exploration and site selection for open and borewells.

关 键 词：Artificial recharge Clogging mechanisms GROUNDWATER PREVENTION REDEVELOPMENT 

分 类 号：P641[天文地球—地质矿产勘探]