نتایج جستجو برای: basins among sub

تعداد نتایج: 1353044  

2006
Winfried Koeniger Marco Leonardi IZA Bonn

Capital Deepening and Wage Differentials: Germany vs. US Capital deepening may affect the evolution of the wage differential between skilled and unskilled workers differently in countries with different labor market institutions. If labor market institutions raise the relative wage of unskilled workers in Germany, firms have incentives to invest relatively more into capital equipment complement...

2007
LAURENT PFISTER JEAN-FRANÇOIS IFFLY LUCIEN HOFFMANN Laurent Pfister

An attempt was made to compensate for the lack of long hydrological time series and the lack of information on maximum streamflow in the Alzette River basin (Luxembourg) via the regionalization of stormflow coefficients. Streamflow data recorded since 1995 with a very dense streamgauge network allowed the determination of maximum stormflow coefficients in 18 sub-basins of the Alzette. The storm...

2013
Matthew Benjamin Laramie

Determining accurate species distribution is crucial to conservation and management strategies for imperiled species, but challenging for small populations that are approaching extinction or being reestablished. We evaluated the efficacy of environmental DNA (eDNA) analysis for improving detection and thus known distribution of Chinook salmon in the Methow and Okanogan Sub-basins of the Upper-C...

2017
Joshua W Chamberlin Brian R Beckman Correigh M Greene Casimir A Rice Jason E Hall

While individual growth ultimately reflects the quality and quantity of food resources, intra and interspecific interactions for these resources, as well as individual size, may have dramatic impacts on growth opportunity. Out-migrating anadromous salmonids make rapid transitions between habitat types resulting in large pulses of individuals into a given location over a short period, which may ...

Journal: :Journal of hazardous materials 2010
Jaime Pizarro Pablo M Vergara José A Rodríguez Pedro A Sanhueza Sergio A Castro

Chilean basins have long been exposed to nutrient discharges from human activities and land use changes. A historical seasonal NO(3)(-)-N and PO(4)(3-)-P database of the last 23 years of the main nine rivers of central-southern region of Chile was analysed. Generalized additive models indicated that annual trends in NO(3)(-)-N and PO(4)(3-)-P are nonlinear. River basins such as Bío-Bío, Bueno, ...

Journal: :Molecular phylogenetics and evolution 2004
Michael E Pfrender Justin Hicks Michael Lynch

We examined genetic diversity within- and among-populations of speckled dace (Rhinichthys osculus) in five major drainage systems in the state of Oregon in western North America. Analysis of sequence variation in a 670-bp segment of the mitochondrial cytochrome b gene revealed deep divergence among basins and high genetic diversity within basins. Application of a molecular clock indicated that ...

2000
Jouni Pulliainen Jenni Vepsäläinen Kari Kallio Sampsa Koponen Timo Pyhälahti Pekka Härmä Martti Hallikainen

The spatial and temporal variation of water quality in Finnish lakes and coastal regions is high compared with typical conditions in open sea areas or in large lakes. Both the lake regions and the coastal archipelago consist of small basins or sub-basins isolated from each other by islands and peninsulas. Moreover, Finnish lakes as well as the Northern Baltic sea annually freezes which has a hi...

2016
M. C. RAMOS J. A. MARTÍNEZ - CASASNOVAS

The aim of the present work was to evaluate the possibilities of using sub-basin data for calibration of the Soil and Water Assessment Tool (SWAT) model in a small ungauged basin (46 ha) and its response. This small basin was located in the viticultural Anoia-Penedès region (north-east Spain), which suffers severe soil erosion. The data sources were: daily weather data from an observatory locat...

Journal: :محیط شناسی 0
علی سلاجقه دانشکدة منابع طبیعی دانشگاه تهران، دانشیار گروه احیا مناطق خشک و کوهستانی سمانه رضوی زاده دانشکدة منابع طبیعی دانشگاه تهران، کارشناس ارشد آبخیزداری و عضو باشگاه پژوهشگران جوان نعمت الله خراسانی دانشکدة منابع طبیعی دانشگاه تهران، استاد گروه محیط زیست مینا حمیدی فر کارشناس ارشد محیط زیست سوسن سلاجقه دانشکدة منابع طبیعی دانشگاه تهران ، دانشجوی کارشناسی ارشد محیط زیست

in the case of iran with arid and semiarid climate and lack of freshwater, pay attention to water quality and its effective factors is necessary. karkheh watershed is more than 5 million hectares in area and with biggest soil dam in asia, which has widespread land use changes in last decades. the most important factors of water volume and water resources reduction are aridity and improper land ...

Extended abstract 1- Introduction Various factors influence the karstification process in the dissolution of carbonate rocks. Karst is common influence result of internal morphodynamics (geological structure and lithology) and external morphodynamics (climate, altitude, vegetation, and time). They affect the karstification of the demise of carbonate rocks. Karst is the result of numerous meth...

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