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Geophysical methods for mapping and monitoring changes in soils and groundwater of coastal areasтезисы доклада
- Авторы: Golovko Larisa, Manstein Y., Orumbaev Sagynbek
- Сборник: Book of Abstracts: 4th Atlas Georesources International Congress (AGIC) Geoscience Innovations For Resource Management: Socio-Economic Challenges In An Environmentally Constrained World
- Тезисы
- Год издания: 2023
- Место издания: Hammamet, Tunisia
- Первая страница: 205
- Последняя страница: 205
- Аннотация: Recently, climate change and the sustainable exploitation of natural resources have received a lot of attention. Soil and fresh water are essential for supporting all life on Earth yet bear the burden of changes impacting many communities around the globe. Rising sea levels and extreme weather events such as hurricanes, high or low temperatures, and excess or deficit precipitation frequently cause flooding or droughts in urban and rural areas and, consequently, problems with soil and groundwater salinization and pollution.Coastal and riparian areas are especially vulnerable to climate change and experience inundation by saline water due to storm surges, rising subsurface waters and shifting patterns of soil productivity. Those areas are also historically densely populated and, therefore, their rural and urban communities are strongly impacted by changes. However, it is very difficult to map, predict, and monitor the variability of the natural resources in those areas. Information about the subsurface (soil properties and groundwater depth and quality) is of vital importance for agricultural production but is very difficult to obtain from online data stores such as satellite imagery repositories and digitized soil maps. For many countries and areas, detailed soil maps still need to be developed. Only the information about topsoil is possible to derive from the imagery of the bare soil, and agricultural land is covered with crops most of the time. Soil profiles are complex and agronomical properties vary not only in the topsoil but also with soil depth. Collecting and analyzing soil samples to fully characterize soil spatial variability impacting crop productivity is not only time-consuming but in most cases cost-prohibiting.Field geophysical methods measuring electrical parameters in situ are promising tools for express soil mapping and monitoring. Our instruments (LandMapper, AEMP14, and SibER) and methodologies of electrical conductivity (EC), vertical electrical sounding (VES), and tomography (ERT) as well as electromagnetic induction (EMI) have been used for soil micro zoning (fertility, salinity, pollution by oil or agrochemicals) and to monitor near-surface groundwater levels and mineralization. An overview of case studies of geophysical methods applications for soil science and hydrology will be presented: ecological studies in coastal areas of Texas and Florida; agronomic mapping in deltas of Volga and Mississippi rivers; urban subsurface studies in Bishkek (Kyrgyzstan), Kiev (Ukraine), and Astrakhan (Russia).A modified combined methodology of multi-depth EC mapping (DC, galvanic contact) and EMI instruments is being developed by authors and will be universally applicable to any land conditions, suitable for both mapping and monitoring, easy to use, and backed with solid research on geophysics, agronomy, and soil science.
- Добавил в систему: Позднякова Лариса Анатольевна