Global Geoinformation System “Suspended Sediment Yield in the River Basins of the Earth”

Ermolaev, O. P.; Maltsev, Kirill; Mozzherin, V. V.; Mozzherin, Vladimir I.

doi:10.15356/0435-4281-2012-2-50-58

Cited by 7 publications

(7 citation statements)

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“…Specifically, the regional GIS "Basin geosystems of the Middle Volga region" (3331 3 rd -order river basins) was generated, and the GIS of a global level "Suspended sediment yield in river basins of the Earth" (more than 2000 basins of medium-sized and large rivers) is being developed for qualitative assessments and spatiotemporal geomorphological analysis of erosion and morphogenesis systems on the globe [1][2][3][4][5][6][7].…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…Assigning the value 1 to all the other objects. It is to be noted that the procedure of identifying artifacts by using the tree of processes is fully automated thus rendering it convenient when handling large serving as the operational-territorial unit, it is advisable to use automated identification algorithms for their boundaries in terms of DEMs which, based on regular coordinate grids, have gained a widespread acceptance among specialists working in quite different directions of geography [1,4].…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…At the second stage the data are represented not by the values in the nodes of the initial grid f(x i ,y i ) but the differences f(x i ,y i ) -0 u  (x i ,y i ), the number of cells is increased twice, and a correction 1 v  for the first approximation is constructed. The second approximation is taken equal to the sum 1 0 1…”

Section: Formulation Of the Problemmentioning

confidence: 99%

See 2 more Smart Citations

Automated construction of the boundaries of basin geosystems for the Volga Federal District

Ermolaev

Maltsev

Ivanov

2014

Geogr. Nat. Resour.

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Using the Volga (Privolzhskii) Federal District as an example, we offer the solution of such a currently central scientific and methodological problem as automated identification of the boundaries of basin geosystems under different landscape and geomorphological conditions in terms of multiresolution digital elevation models. The main stages of work are described, namely the development of the digital elevation model, its hydrological adjustment, identification of the boundaries of basin geosystems, and validity assessment of results obtained. The technique has been developed for constructing a hydrologically valid digital elevation model with the purpose of identifying the boundaries of basin geosystems.

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Section: Formulation Of the Problemmentioning

confidence: 99%

Section: Formulation Of the Problemmentioning

confidence: 99%

Section: Formulation Of the Problemmentioning

confidence: 99%

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Automated construction of the boundaries of basin geosystems for the Volga Federal District

Ermolaev

Maltsev

Ivanov

2014

Geogr. Nat. Resour.

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“…The article [Yermolaev, et al, 2012] considers general theoretical and methodological issues of creating and using a global geographic information system, which reflects the basic patterns of formation and spatio-temporal variability of the flow of suspended sediments of the Earth's rivers. The role of the river basin as a geosystem approach to the study of sediment runoff is shown.…”

Section: Introductionmentioning

confidence: 99%

Geodesy, Cartography, and Aerial Photography

Protsyk¹,

Chetverikov²,

Ivanevych³

2021

ISTCGCAP

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Aim of the work. To develop a method of automated allocation of catchment basins and obtaining their hydrological and morphometric characteristics, which is based on digital terrain models. Methods and results of work. A necessary condition for the correct filling of the terrain is the presence of points of true flow at the edge of the settlement area (if the river flows into the lake, it should not enter the calculated area completely, otherwise incorrect results will be obtained). By performing the operation of filling the relief of the terrain, a new dem is created, which does not contain fictitious depressions and is used in the next step as input data to calculate the flow direction according to the algorithm d8. According to the proposed technological scheme it is necessary to process step by step the following six blocks: filling of closed depressions, calculation of runoff direction, calculation of total runoff, creation of point vector data set of closing points (mouth points), creation of watershed boundaries, raster-vector data conversion. Theoretical research tested the method of automated allocation of watersheds, namely the determination of hydrological and morphometric parameters of the terrain. The pools were ranked according to these parameters according to the existing classifications, a series of relevant thematic electronic maps was compiled. It should be noted that in Skole district of lviv region there are 590 catchment areas, and their area is 1407 km2. Watersheds are classified by outcrop, namely low-mountain basins in the region of 6, their area is 7 km2, medium-mountain 360, area 755 km2, high-mountain 224, area 645 km2. Pools are classified according to the average slope: the first category from 0-3 degrees, very gentle slopes - pools 27, area 7 km2; the second category from 9-12 degrees, sloping slopes-pools of 128, the area 303 km2; the third category from 12-15> degrees, steep slopes - pools of 225, the area 648 km2. The accuracy between the reference and the original relief model was evaluated. We can say that sle = 0.63 (m) slope, sle = 5.43 (m) height. Scientific novelty and practical significance. The technological scheme of automated separation of catchment basins according to digital relief models for Skoliv district of lviv region is proposed and the method of separation of catchment basins is worked out. According to the developed method, maps of watercourses of different orders and their catchment basins and classification of basins by area on the territory of Skole administrative district, which can be used by local organizations on water resources, are constructed.

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“…SSY mapping involved 53% of the total area of the Volga River basin. As a result, the maps on the suspended sediment yield for the basin included areas of taiga, mixed and broadleaf forests, forest-steppes, steppes and semi-deserts (Maltsevet al 2012;Yermolaev et al 2012;Yermolaev, 2014).…”

Section: Introductionmentioning

confidence: 99%

Suspended sediment yield mapping of Northern Eurasia

2015

Self Cite

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The mapping of river sediment yields at continental or global scale involves a number of technical difficulties that have largely been ignored. The maps need to show the large zonal peculiarities of river sediment yields, as well as the level (smoothed) local anomalies. This study was carried out to create a map of river sediment yields for Northern Eurasia (within the boundaries of the former Soviet Union, 22 × 10 6 km 2 ) at a scale of 1:1 500 000. The data for preparing the map were taken from the long-term observations recorded at more than 1000 hydrological stations. The data have mostly been collected during the 20th century by applying a single method. The creation of this map from the study of river sediment yield is a major step towards enhancing international research on understanding the mechanical denudation of land due mainly to erosion.

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Global Geoinformation System “Suspended Sediment Yield in the River Basins of the Earth”

Cited by 7 publications

References 0 publications

Automated construction of the boundaries of basin geosystems for the Volga Federal District

Automated construction of the boundaries of basin geosystems for the Volga Federal District

Geodesy, Cartography, and Aerial Photography

Suspended sediment yield mapping of Northern Eurasia

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