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Hydro-hypsometric analysis of tropical river basins,Southwest Coast of India using geospatial technology

Journal of Mountain Science 2016年第5期13卷 939-946页

作者： Gopinath GIRISH Ambili Gopalan KAMALAMMA N P JESIYA Kuriachan LEMOON Centre for Water Resources Development and Management Kerala 673571India

The key aspect in planning and management of water resources is to analyze the runoff potential and erosion status of the river *** the detailed investigation of hydrological response freely available Cartosat-1(IRS-P5) data was used for the preparation of digital elevation model(DEM).The runoff potential and type of erosive process of 22 river basins originating in the global biodiversity hotspot of Western Ghats,was inferred through hypsometric *** parameters like Hypsometric integral(HI),maximum concavity(Eh),coordinates of slope inflection point(I) given by a* and h* and normalized height of hypsometric curve(h) were extracted from the hypsometric curves and used for understanding the hydrological *** the hypsometric curves,the landform evolution processes were *** of diffusive and fluvial processes in slope degradation of the river basins was *** with lesser area(basins no such correlation *** on the study,river basins can be prioritized for the appropriate conservation measures.

关键词： Hypsometry Runoff potential Erosion status Cartosat-1 data river basins

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A New Approach to the Ordered Classification of Critical Factors in the Degradation Processes of river basins

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Journal of Environmental Science and Engineering(B) 2019年第6期8卷 258-267页

作者： Antonio Cunha Nunes Fernando B.Mainier Robson Rosa Branco Carlos Alberto Pereira Soares Escola de Engenharia Universidade Federal FluminenseNiteroiRio de JaneiroBrazil

The aim of this paper is to present through information collected via qualitative analysis in order to provide an alternative perspective to classify critical factors and their correlations in the processes of degradation of river basins in countries in development in an ordered *** study was started with a bibliographical review for gathering relevant information about the main factors,which was submitted to specialists and related professionals via survey developed in a format of answers on Likert scale,with the analyses of data from the respondents as well as their contribution within sample assembly exploratory factorial analysis and the charge factor item from the questionnaire with usage of polychoric correlation matrix with which it is proposed to establish the ordering of the factors relevance as well as their correlations through parametric statistical analysis with the usage of a generalized model of partial credit which belongs to the family of the models for polyatomic gradual answers to the item response theory(IRT)and the applying of cluster analysis(ICLUST)with the usage of both alpha and omega coefficient for the estimation of the variables group,with the R *** a result,the present study aims to establish a comprehension of the main factors for the ordering of the actions and attention of public and private sectors towards the preservation of urban river basins.

关键词： Degradation river basins critical factors society an environment psychometry

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Changes in Grain Production and the Optimal Spatial Allocation of Water Resources in China

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Journal of Resources and Ecology 2016年第1期7卷 28-35页

作者：金涛秦小瑜黄丽艳扬州大学农学院扬州225009

Changes in grain production are decomposed and compared among nine major Chinese river basins for the sake of optimal water allocation. The results show that water-deficient northern China, especially the Songliao river Basin and Huai river Basin, contributed the greatest share of the total grain increment from 1995 to 2010. The Songliao river Basin achieved increased grain output largely by expanding multiple cropping, while the Huai river Basin achieved it mainly by improving the yield per unit area. With increased reliance on expanding irrigation and multi-cropping, most northern basins have high levels of agricultural water consumption, despite the rising share of corn, a lower water intensive crop. In contrast, over the same period the warm and humid south, traditionally a major rice-growing area, mostly experienced a sharp decline in rice cropping area and the Southeast rivers Basin even reduced multiple cropping indexes, contributing to decreased agricultural water consumption. Implications of our findings and the need for tackling the imbalance of agricultural water use in grain production are discussed.

关键词： grain production change agricultural water usage river basins decomposition method China

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