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ERM-01

LandMapper ERM-01 - simple handheld resistivity meter

Throw away your augers and soil samplers! Well, not quite... LandMapper® ERM-01 is new non invasive device, which will help you to map land parcels with contrasting soil properties within the fields quickly, non destructivelyand cost-efficiently.

Landmapper is an excellent tool for soil mapping required for environmental consulting, golf courses maintenance, construction services, farm management, new land development, and real-estate planning. It is a must have tool for forensic and archaeological investigators, even for serious treasure hunters. Using this non invasive device prior to soil sampling you can significantly reduce the amount of samples required and precisely design a sampling plan based on the site spatial variability.

LandMapper® ERM-01 measures electrical resistivity or conductivity of soils and related media for express non invasive mapping and monitoring of agricultural fields as well as construction and remediation sites. In a typical setting, a four-electrode probe is placed on the surface and an electrical resistivity value is read from the digital display. The device measures electrical resistivity in a surface layer of the depth from 2 cm down to 20 m, which is set by varying the size of a four-electrode probe. Measurements are based on well-known four-electrode principle, which allows to avoid influence of electrode contact potential on measured electrical conductivity or resistivity of the media and obtain accurate readings.  The field tests were performed by our customers in USA, Russia, China, Canada, Sweden, France, Germany, Iraq, Dubai, Brazil, Panama and many others.

Electrical Geophysical Methods to Evaluate Soil Pollution from Gas and Oil Mining

transect across bitumen polluted soil and brune collectorElectrical geophysical methods were successfully used for exploration of gas and oil fields (Kalenev, 1970). However, the methods are not widely used for estimation of the soil pollution with petroleum products (Znamensky, 1980; Pozdnyakov et al., 1996a). The possibility of using the methods of electrical resistivity to evaluate the places of petroleum pollution or natural petroleum and gas deposits is based on highly different resistivities of soil and petroleum products. Petroleum and various products of petroleum manufacture, such as oil, gasoline, bitumen, and kerosene have very high electrical resistivity compared with soils. Electrical resistivity of petroleum varies from 104 to 1019 ohm m (Fedinsky, 1967), whereas resistivity of petroleum-saturated sand is much lower (2200 ohm m) (Znamensky, 1980), but is still higher than that of any non-polluted soil.

Soil pollution by the products of gas and petroleum mining was studied near Urengoi in northwest Siberia, Russia. The virgin soils, Glacic and Aquic Haplorthels, were extremely polluted with various by-products of petroleum extraction and manufacturing, such as bitumen, gasoline, kerosene, and mining brine solutions. The study area was thoroughly investigated with four-electrode profiling on 1.2-m array and vertical electrical sounding.

Location

Urengoj 65° 57' 27" N, 78° 23' 4.2" E

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Our Case Studies

Applications of electrical geophysical methods in agriculture including precision agriculture and horticulture, soil mapping, stone and salt content mapping, detection of groundwater level and peat deposits. More >>
Applications of electrical geophysical methods in civil and environmental engineering including detection of groundwater rising in urban areas, mapping of oil polluted soils, and depth to permafrost layer. More >>
Electrical geophysical methods in forensic and archaeological applications including searching for soil disturbances of criminal origin, mapping preferential water fluxes destroying holy caves in Kiev, Ukraine. More >>

Locations

Beumont, TX 30° 4' 48.6264" N, 94° 7' 35.6016" W
Delta Volga 46° 6' 31.4028" N, 48° 4' 44.1048" E
Kiev 50° 27' 0.36" N, 30° 31' 24.24" E

LandMapper, NEP, and Self-Potential methods for Forensic and Archaeological Applications

detect burial places under uniform grass

Four-electrode probe for detection of burial places of criminal origin

We used electrical geophysical methods to measure the disturbance of the soil together with the properties of a hidden object itself. The study was conducted in collaboration with Russian Ministry of Internal Affairs to test methods for fast outlining soil disturbance places to help criminological search. The method is based on measurements of soil bulk electrical resistivity and principles of soil formation.

 

complex geophysical investigations in Kiev, Ukraine

Electrical geophysical methods to study subsurface water movement in urban areas

Hazardous hydrological situation caused by unknown factors appeared in Kiev-Pechersk Lavra (Kiev, Ukraine) near The Church of Holy Cross Elevation in 1987. The problem was attributable to temporary subsurface water fluxes fed by precipitation. Methods of 4-electrode profiling, vertical electrical sounding, and self-potential were utilized.

   

Locations

Westampton, NJ 40° 1' 14.1528" N, 74° 47' 31.992" W
Zelinograd, MOS 55° 59' 24.2736" N, 37° 9' 43.47" E
Kiev 50° 27' 0.36" N, 30° 31' 24.24" E

How-to use LandMapper and consumer-grade GPS data-logger to quickly map salinity on farm fields

GPS waypoints in Google EarthTask on hand: estimate salinity level on fields planned for rice next year. Six fields with total area of 322 acres were selected by farmer.

Equipment on hand: two LandMappers with different size probes attached (measuring electrical conductivity (EC) down to ~ 8” and 18”), Columbus GPS data-logger, all-road vehicle or “Mule”. Three people: farmer driving a '”mule” and recording data on paper, one person measuring with Landmapper at 18” depth, other person measuring EC with LandMapper to 8” depth and recording POI or way points with GPS. Results: 30 points recorded in less than 1.5 hour (including about 45 min break to wait out the rain). EC in the field varied from 5 mS/m to 106 mS/m on surface; and from 19 mS/m to 400 mS/m in deeper layer.

Location

Farm Winnie, TX 29° 36' 14.6448" N, 94° 21' 7.0524" W
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