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Dynamics of changes in surface water quality indicators of the Western Bug River basin within Ukraine using GIS technologies

Igor Gopchak Tetiana Basiuk Ihor Bialyk Oleg Pinchuk Ievgenii Gerasimov
Journal of Water and Land Development | 2019 | No 42 | 67-75
Keywords ecological index environmental assessment environmental condition GIS technologies river surface water water quality
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Abstract

The environmental assessment of the surface water quality of the Western Bug River has been made using the system of classification quality of land surface water of Ukraine in accordance with the approved methodology, which allows comparing water quality of separate areas of water objects of different regions. The calculation of the environmental as-sessment of water quality has been carried according to three blocks: block of salt composition, block of trophic and sapro-bic (ecological and sanitary) indicators and block of indicators of content of specific toxic substances. The results are pre-sented in the form of a combined environmental assessment, based on the final conclusions of the three blocks and consists in calculating the integral ecological index. Comprehensive studies of changes in the water quality of the Western Bug Riv-er have been conducted within the territory of Ukraine for a long-term period. The water quality of the river on the final values of the integral indicators of the ecological condition corresponded mainly to 4nd category of the 3rd class – the wa-ter is “satisfactory” by condition and “little polluted” by degree of purity (except for points of observation that located within the Volyn region, where the water quality corresponded to 3rd category and the 2nd class. It is “good” by condition and “fairly clean” by the degree of purity). Visualization and part of the analysis are performed using GIS technologies in the software of the ArcGIS 10.3.

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Authors and Affiliations

Igor Gopchak
Tetiana Basiuk
Ihor Bialyk
Oleg Pinchuk
Ievgenii Gerasimov

Environmental and economic effects of water and deflation destruction of steppe soil in Ukraine

Nataliia Dudiak Vitalii Pichura Larisa Potravka Natalia Stratichuk
Journal of Water and Land Development | 2021 | No 50 | 10-26 | DOI: 10.24425/jwld.2021.138156
Keywords adaptive and landscape erosion control design environmental and economic consequences erodibility of soil geomodeling GIS-technologies steppe zone water erosion
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Abstract

Water and wind erosion are the most powerful factors in the decrease of soil fertility and a threat to food security. The study was conducted on the steppe zone in Ukraine (total area of 167.4 thous. km2), including agricultural land (131.6 thous. km2). At the first stage, the modeling of spatial differentiation of water and wind erosion manifestations was carried out to calculate losses of soil (Mg·ha–1) and to determine their degradation. At the second stage, soil-climatic bonitet of zonal soils (points) is carried out to determine their natural fertility (Mg·ha–1). At the third stage, the spatial adjustment of the natural soil fertility to the negative effect of erosion was carried out. This made it possible to calculate crop losses and total financial losses due to water and wind erosion. The integrated spatial modeling showed that about 68.7% of arable land was constantly affected by the combined erosion, in particular the area of low eroded arable land (16.8%), and medium and highly eroded land (22.1%). Due to erodibility of soil, about 23.3% of agricultural land transferred from the category of high and medium quality to medium, low and very low quality, which is caused by the loss of soil fertility of up to 70%, crop losses of up to 1.93 Mg·ha–1 ha–1 and eduction of agricultural income up to 390 USD·ha–1. In the steppe region under the research, gross crop losses from erosion were up to 15.11 thous. Mg·ha–1 (3.05 mln USD). In order to protect soils, improve fertility and increase crop yields in the steppe zone in Ukraine, the following measures were suggested: adaptive and landscape erosion control design with elements of conservation farming in accordance with the spatial differentiation of soil quality and extent of water erosion deflation danger.
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Authors and Affiliations

Nataliia Dudiak
1
ORCID: ORCID
Vitalii Pichura
1
ORCID: ORCID
Larisa Potravka
1
ORCID: ORCID
Natalia Stratichuk
1
ORCID: ORCID
  1. Kherson State Agrarian and Economic University, Faculty of Fisheries and Nature Management, Stritens'ka str. 23, Kherson, 73006, Ukraine

Spatial differentiation of regulatory monetary valuation of agricultural land in conditions of widespread irrigation of steppe soils

Vitalii Pichura Larisa Potravka Nataliia Dudiak Alexander Stroganov Olha Dyudyaeva
Journal of Water and Land Development | 2021 | No 48 | 182-196 | DOI: 10.24425/jwld.2021.136161
Keywords ecological and agro-ameliorative indices GIS technologies irrigation methodology modelling regulatory and monetary valuation relief and climatic conditions soil quality class
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Abstract

The article presents results of quality class determination and regulatory and monetary valuation of agricultural land in the steppe soils irrigation zone using the Karmanov’s methodology of soil and climatic quality class determination and au-thor's methodology of ecological, agro-ameliorative and climatic soils quality class determination. Based on the results of spatial modeling, a series of maps was created and characteristics of ecological, agro-ameliorative and relief and climatic components of soils quality class were presented based on the example of the Kherson Region, Ukraine. According to the results soil and climatic quality class determination, it is established that the value of the class varies from 25 to 46 points; the regulatory and monetary value of agricultural land varies from USD 490 per 1 ha for dark chestnut and chestnut al-kaline soils up to USD1,360 per ha for ordinary chernozem. According to the results of ecological, agro-ameliorative and climatic soils quality class determination, it is established that the value of the class varies from 6 to 59 points; the regulato-ry and monetary value of agricultural land varies from USD145 per 1 ha for degraded and highly saline chestnut soils up to USD2,060 per ha for irrigated southern chernozem. The suggested methodology of soil quality class calculation can have multiple purposes. It is intended to be used for different physiographic conditions of land use to develop adaptive soils pro-tection measures at different territorial levels of agricultural production management with the overall objective of ensuring sustainable land use.
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Authors and Affiliations

Vitalii Pichura
1
ORCID: ORCID
Larisa Potravka
1
ORCID: ORCID
Nataliia Dudiak
1
ORCID: ORCID
Alexander Stroganov
1
Olha Dyudyaeva
1
  1. Kherson State Agrarian and Economic University, Stritens'ka str. 23, Kherson, 73006, Ukraine

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