A new method of determining the state of water and agricultural areas in real time

Abstract

Paper discusses the technique of environmental condition monitoring based on the phenomenon of nuclear magnetic resonance (NMR). Express control is an integral part of agriculture, because when working on farms or in fields there are situations when it is physically impossible to deliver samples for research to a stationary laboratory (results are needed urgently or samples can change their properties during transportation). A brief review of the existing methods for monitoring the states of media in the express mode was carried out, their shortcomings were revealed and a new technical solution to this problem was proposed. For a small-sized NMR spectrometer, a new magnetic system and a signal registration circuit have been developed, which makes it possible to detect the NMR signal at different frequencies, thus registering the signal spectrum. In addition, this design also allows measuring the longitudinal and transverse relaxation times of the medium. With the help of the proposed technique, studies of various media have been carried out; the results of these studies are presented.

Monitoring of soil pollution caused by industrial enterprises in one of the districts of St. Petersburg

“…The sharp reduction of forests and green areas has led to a decrease in the ability to process emissions of carbon dioxide and other harmful substances [1,3,8,9,[16][17][18][19]. The development of large cities with extensive industrial areas reinforces this trend [7,17,[20][21][22][23]. Urban areas located between enterprises and residential areas are particularly affected in this case.…”

Study of the impact of recultivated granite stone quarry dumps on the environment and agricultural land in the Leningrad region

“…This includes economic (unsuitability of nearby land for agricultural activities) and social (increase in occupational diseases among quarry workers) problems. It is constantly necessary to control the state of people's health in the express mode [44][45][46]. Environmental problems (environmental pollution, the death of some living organisms, land degradation) should be noted in particular [47,48].…”

Method for forecasting pollution of urban areas

“…In order to answer the question about the state of environmental pollution, it is necessary to conduct systematic observations and assess the technogenic impact on natural objects of urban agglomerations. Many scientists consider the geoecological problems of urban areas, trying to find new forecasting methods and methods for assessing the current situation, under the influence of technological progress [4][5][6][7][8][9]. Globally, adverse effects on human health and air quality can be considered as a result of anthropogenic activities responsible for economic development and energy dependence [10][11][12][13][14].…”