scholarly journals Geomorphologic Analysis of Small River Basin within the Framework of Fractal Tree

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2480
Author(s):  
Meiyan Feng ◽  
Kwansue Jung ◽  
Joo-Cheol Kim
Keyword(s):  
River Basin ◽  
Growth Process ◽  
River Basins ◽  
Small River ◽  
Channel Network ◽  
Limited Region ◽  
Anisotropic Property ◽  
Small River Basin ◽  
Bifurcation Process ◽  
Geomorphologic Analysis

This paper presents the modified framework of geomorphologic analysis based on the concept of fractal tree. Especially, it is intended to provide hydrologic practitioners with the information on the fractal property of small river basins. To this end, the complete drainage path network is applied to a growth process of a fractal tree for the basin of interest by connecting a channel network to overland drainage pathways. The growth process of a fractal tree would occur only within the limited region possessing channel flow properties in a natural river basin. The exponent of the intra basin type of Hack’s law could show a variable trend in small river basins mainly due to anisotropic property of the catchment planform. The bifurcation process of a drainage path network might be more sensitive to the growth step of the fractal tree than the meandering process of drainage path segment. The fractal dimension from the sinuosity of a channel segment is relatively stable compared to the one from the bifurcation process of the network, so that the geomorphologic features of a small river basin can be characterized by the anisotropic property of catchment planform as well as the bifurcation property of drainage path network with the growth of the fractal tree.

scholarly journals ESTIMATION OF ANTHROPOGENIC LOAD ON THE VESELUKHA SMALL RIVER BASIN

2019 ◽  
pp. 82-87
Author(s):  
І. V. Gopchak ◽  
T. O. Basiuk
Keyword(s):  
Water Quality ◽  
River Basin ◽  
River Runoff ◽  
River Basins ◽  
Ecological Condition ◽  
The State ◽  
Small River ◽  
Anthropogenic Load ◽  
Ecological State ◽  
Small River Basin

Relevance of research. As a result of economic activities and irrational use of water and land resources in small river basins there are problems connected with pollution, destruction of natural landscape complexes of river valleys and adjoining territories, engineering reorganization of canals and floodplains as a result of melioration works. All these changes in river basins require operational control and response, which is possible only if real estimation of the level of anthropogenic load on river basins is carried out and the limits of permissible economic interference in their ecosystem are determined. The purpose of research – assessment of the ecological condition of the basin of the Veselukha River by the criteria of anthropogenic load. Research methods. The analysis of anthropogenic load and evaluation of the ecological condition of the Veselukha River basin was carried out in accordance with "Methodology for calculation of anthropogenic load and classification of the ecological state of small river basins of Ukraine". The calculation was made using the logic-mathematical model "Small River Basin", for four independent models of the main subsystems of the river basin: radioactive contamination of the territory, land use, use of river runoff, water quality. The quantitative and qualitative anthropogenic conditions by various indicators of four subsystems for classification of the ecological state of the river basin were estimated. Research results. According to the state of radioactive contamination, the area of the river catchment was estimated as "satisfactory". Based on the results of the analysis, the integrated value of land use was 3.7 and the state of the subsystem "Use of land" in the basin of the Veselukha river was determined as "good". The general state of river runoff use in the basin based on the joint effect of all these indicators of anthropogenic load on the state of the subsystem "Use of river runoff" was evaluated as "good" with a quantitative value of 3.0. The general condition of the subsystem "Water Quality" in the basin of the Veselukha River is characterized by the IV class of water quality, it corresponds to "polluted", with a quantitative level of -1. According to the results of the integrated assessment of all subsystems of the river basin, an induction coefficient of anthropogenic load (ICAN) was specified as is -1.0 and classifies the ecological state of the Veselukha River basin as "minor changes".

Application of geomorphometric analysis for small river basins in the Selenga middle mountains (on the example of Tarbagatayka river basin)

2019 ◽  
Vol 948 (6) ◽  
pp. 30-38
Author(s):  
M.Y. Opekunova ◽  
A.V. Bardash
Keyword(s):  
River Basin ◽  
Water Flow ◽  
Total Curvature ◽  
River Basins ◽  
Surface Curvature ◽  
Small River ◽  
Basin Analysis ◽  
Coding System ◽  
System Maps ◽  
Middle Mountains

The authors present the data of a geomorphometric Tarbagatayka river basin analysis (Selenga middle mountains) for the purpose of subsequent geomorphological zoning within the framework of allocating the erosion-and-accumulative potential of the basins. The basis for the surface curvature maps were the creation of a DEM basing upon ALOS data, the construction of water flow orders’ scheme in the Straler-Filosofov coding system. Maps of horizontal, vertical and total curvature were obtained, statistical coefficients of these indicators were determined for each of the basins of the 3–4th order and in general for the Tarbagatayka. In the Tarbagatayka basin both in terms of plan and profile convex shapes of the surface pre-dominate, variations in curvature indices correlate well with the morphostructural plan of the territory, which is illustrated by the map of the total curvature. Applying the vector ruggedness measure (VRM) together with surface curvature maps can be used later to determine the erosion-accumulative potential of basins using the methods of structural basins’ coefficients. This approach can be successfully implemented in geomorphological studies and within the framework of the basin concept as well.

scholarly journals ENSEMBLE FORCASTING OF RAINFALL AND FLOOD IN A SMALL RIVER BASIN

2013 ◽  
Vol 69 (4) ◽  
pp. I_1597-I_1602 ◽  
Author(s):  
Kenichiro KOBAYASHI ◽  
Shigenori OTSUKA ◽  
Kaoru TAKARA ◽  
Seiji ORIGUCHI ◽  
Kazuo SAITO
Keyword(s):  
River Basin ◽  
Small River ◽  
Small River Basin

Seasonal distributions of fungicides in soils and sediments of a small river basin partially devoted to vineyards

2007 ◽  
Vol 41 (19) ◽  
pp. 4515-4525 ◽  
Author(s):  
A. Bermúdez-Couso ◽  
M. Arias-Estévez ◽  
J.C. Nóvoa-Muñoz ◽  
E. López-Periago ◽  
B. Soto-González ◽  
...  
Keyword(s):  
River Basin ◽  
Small River ◽  
Soils And Sediments ◽  
Small River Basin
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