نتایج جستجو برای: physical characteristics of watershed

تعداد نتایج: 21220890  

Journal: :Environmental Management 2008
Walter K. Dodds Robert M. Oakes

We investigated the influence of riparian and whole watershed land use as a function of stream size on surface water chemistry and assessed regional variation in these relationships. Sixty-eight watersheds in four level III U.S. EPA ecoregions in eastern Kansas were selected as study sites. Riparian land cover and watershed land use were quantified for the entire watershed, and by Strahler orde...

2010
David A. Swayne Wanhong Yang A. A. Voinov A. Rizzoli G. N. Wijesekara A. Gupta C. Valeo J. G. Hasbani D. J. Marceau

Due to the rapid population growth and urbanization in the City of Calgary, the Elbow River watershed in southern Alberta covering 1238 km has been subjected to considerable land-use changes over the last decade. The objective of this study is to assess the impact of land-use intensification simulated with a cellular automata (CA) model on the hydrological processes of the watershed using MIKE-...

Journal: :Environmental Modelling and Software 2004
Jian J. Dai Stefan Lorenzato David M. Rocke

A watershed is a complex ecosystem. Assessment of watershed condition entails consideration of numerous issues and factors. The problem is complex, the issues are not well defined, and data are often lacking. These characteristics suggest that a knowledgebased approximate reasoning approach is especially useful for watershed assessment. This paper describes a knowledge base for watershed assess...

Background and objective: Natural disasters have always endangered human lives. Flood is one of the most important natural disasters that impose many damages every year in different parts of Iran. This paper tries to study flood and characteristics of Can watershed in Tehran province. The main purpose of this paper is to consider the challenges of flood management in agriculture and provide app...

Extended abstract 1- Introduction Soil erosion is the most important cause of land degradation and the cause of water loss, soil loss, sedimentation in water resources, and maximum flood intensification (Liu et al., 2019). Models are the most important tools for estimating and mapping of erosion at the watershed level. As the experimental models are dependent on used coefficients and region c...

Journal: :journal of agricultural science and technology 2012
m. r. amiryousefi m. zarei m. azizi m. mohebbi

pomegranate is an important iranian-native fruit, with many varieties cultivated. although the volume of data on the importance of pomegranates in human nutrition has increased tremendously in the last years, the physical properties of the pomegranate fruit during fruit maturity have not yet been studied in detail. thus, the present study aimed to evaluate changes in physical characteristics of...

2015
J. R. Larouche B. W. Abbott W. B. Bowden J. B. Jones

Introduction Conclusions References

Journal: :محیط زیست طبیعی 0
فاطمه باطنی دانشجوی دکتری سیما فاخران اصفهانی هیات علمی گروه محیط زیست دانشکده منابع طبیعی دانشگاه صنعتی اصفهان علیرضا سفیانیان هیات علمی گروه محیط زیست دانشکده منابع طبیعی دانشگاه صنعتی اصفهان نوراله میرغفاری هیات علمی گروه محیط زیست دانشکده منابع طبیعی دانشگاه صنعتی اصفهان

landscape characteristics and land use patterns of watershed demonstrate extension, distribution, density and abundance of human interference. these factors can affect water quality of adjacent aquatic systems within a watershed. land use changes have caused various environmental problems for zayandehroud river,turned it as a sink of pollutant. therefore this is investigated that how would land...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده اقتصاد 1389

abstract: about 60% of total premium of insurance industry is pertained?to life policies in the world; while the life insurance total premium in iran is less than 6% of total premium in insurance industry in 2008 (sigma, no 3/2009). among the reasons that discourage the life insurance industry is the problem of adverse selection. adverse selection theory describes a situation where the inf...

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