نتایج جستجو برای: river basin

تعداد نتایج: 123719  

2007
L. S. KUCHMENT A. N. GELFAN

Abstract An analysis of snow cover measurement data in a number of physiographic regions and landscapes has shown that fields of snow cover characteristics exhibit statistical self-similarity property. This property is useful when, because of a sparse measurement network, the spatial variability of snow cover can be determined only for large enough basins. Small-scale variability of snow cover ...

2008
Karl W. Wegmann Frank J. Pazzaglia

We synthesize a new fluvial terrace chronostratigraphy of the Bidente and Musone Rivers cast within a broader European framework, which forms the basis of a terrace genesis and river incision model for the northern Apennines, Italy. Our model, supported by terrace long profiles, correlation to Po foreland sediments, 15 new radiocarbon dates, and published numeric and relative stratigraphic ages...

2018
Weili Duan Bin He Yaning Chen Shan Zou Yi Wang Daniel Nover Wen Chen Guishan Yang

Comprehensive understanding of the long-term trends and seasonality of water quality is important for controlling water pollution. This study focuses on spatio-temporal distributions, long-term trends, and seasonality of water quality in the Yangtze River basin using a combination of the seasonal Mann-Kendall test and time-series decomposition. The used weekly water quality data were from 17 en...

2007
Gregory J. McCabe David M. Wolock

[1] The high demand for water, the recent multiyear drought (1999–2007), and projections of global warming have raised questions about the long-term sustainability of water supply in the southwestern United States. In this study, the potential effects of specific levels of atmospheric warming on water-year streamflow in the Colorado River basin are evaluated using a water-balance model, and the...

2017
Larry Benson D. L. Leach

Benson, L.V. and Leach, D.L., 1979. Uranium transport in the Walker River Basin, California and Nevada. J. Geochem. Explor., 11: 227-248. During the summer of 1976 waters from tributaries, rivers, springs and wells were sampled in the Walker River Basin. Snow and sediments from selected sites were also sampled. All samples were analyzed for uranium and other elements. The resulting data provide...

2000
Jagdish Krishnaswamy Michael Lavine Daniel D. Richter Karl Korfmacher

Modeling of sediment transport in relation to changing land-surface conditions against a background of considerable natural variability is a challenging area in hydrology. Bayesian dynamic linear models (DLMs) however, o€er opportunities to account for non-stationarity in relationships between hydrologic input and basin response variables. Hydrologic data are from a 40 years long record (1951±1...

2016
Daeha Kim Jagath J. Kaluarachchi Mark R. McLellan

Agricultural Water Management in the Sevier River Basin, Utah: A Multidisciplinary Approach

2015
Xiaofan Zeng Na Zhao Huaiwei Sun Lei Ye Jianqing Zhai João Miguel Dias

The comprehensive assessment of climatic and hydrological droughts in terms of their temporal and spatial evolutions is very important for water resources management and social development in the basin scale. To study the spatial and temporal changes of climatic and hydrological droughts and the relationships between them, the SPEI and SDI are adopted to assess the changes and the correlations ...

2014

Abstract Introduction Carriage of cargo on the river vessels is the most convenient and cost-effective mode of transport in countries with a developed system of navigable rivers and canals. The North river basin is one of the largest in extent and difficult navigation conditions on the territory of the Russian Federation. It covers the basins of major rivers of the Northern Dvina, Pechora, Meze...

Journal: :Environmental monitoring and assessment 2011
Yongyong Zhang Jun Xia Junfeng Chen Minghua Zhang

Water quantity and quality joint operation is a new mode in the present dams' operation research. It has become a hot topic in governmental efforts toward integrated basin improvement. This paper coupled a water quantity and quality joint operation model (QCmode) and genetic algorithm with Soil and Water Assessment Tool (SWAT). Together, these tools were used to explore a reasonable operation o...

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