نتایج جستجو برای: liudaogou catchment

تعداد نتایج: 12247  

2002
Tony H.F. Wong Tim D. Fletcher Hugh P. Duncan John R. Coleman Graham A. Jenkins

Catchment urbanisation leads to increased hydraulic and pollutant loadings into receiving waterbodies. Issues concerning pollution that endangers the sustainable utilisation of water resources have focused government authorities towards integrated catchment management, where both causes and effects of pollution are addressed. Recent research has provided a platform for improving urban stormwate...

2005
THOMAS MEIXNER MARK FENN

In this study biogeochemical export in a set of catchments that vary from 6ha to almost 1500ha is investigated. Studying catchments across this large range of scales enables us to investigate the scale dependence and fundamental processes controlling catchment biogeochemical export that would not have been possible with a more limited data set. The Devil Canyon catchment, in the San Bernardino ...

Journal: :تحقیقات جغرافیایی 0
مجید زاهدی مریم بیاتی خطیبی داود مختاری فریبا کرمی مریم بیاتی خطیبی داود مختاری

because of the presence of special properties in semi arid catchment, these areas are suitable for drought events. the responses of these areas to drought events are in the form of the disappearance of plant cover on surfaces slopes, intensive erosion or landslide occurrence on side of rivers’ course. azarshahr catchment (situated in 37ëš 36′ to 37ëš 49′ n and 44ëš 20′ to 45ëš 49′ e) ...

2008
B. Schmalz

The achievement of a good water quality in all water bodies until 2015 is legally regulated since December 2000 for all European Union member states by the European Water Framework Directive (EU, 2000). The aim of this project is to detect nutrient entry pathways and to assess the dominating hydrological processes in complex mesoscale catchments. The investigated Treene catchment is located in ...

2015
YANGBO CHEN JI LI SHAOKUN HUANG YI DONG

Beijiang catchment is a small catchment in southern China locating in the centre of the storm areas of the Pearl River Basin. Flash flooding in Beijiang catchment is a frequently observed disaster that caused direct damages to human beings and their properties. Flood forecasting is the most effective method for mitigating flash floods, the goal of this paper is to develop the flash flood foreca...

2016
Daniel Hunkeler

Alluvial aquifers in mountainous regions cover typically a limited area. Their contribution to catchment storage and outflow is rarely isolated; alluvial groundwater discharge under gauging stations is generally assumed negligible; and hydrological models tend to lump alluvial storage with other units. The role of alluvial aquifers remains therefore unclear: can they contribute significantly to...

2016
Jan Bauer David A Groneberg

We integrated recent improvements within the floating catchment area (FCA) method family into an integrated 'iFCA`method. Within this method we focused on the distance decay function and its parameter. So far only distance decay functions with constant parameters have been applied. Therefore, we developed a variable distance decay function to be used within the FCA method. We were able to repla...

2012
Iqbal Hossain Monzur Alam Mohammed Iqbal Hossain

Estimation of stormwater pollutants is a pre-requisite for the protection and improvement of the aquatic environment and for appropriate management options. The usual practice for the stormwater quality prediction is performed through water quality modeling. However, the accuracy of the prediction by the models depends on the proper estimation of model parameters. This paper presents the estima...

2004
Colin Green

The Associated Flood Management Programme of the World Meteorological Organisation and Global Water Partnership (2002) has suggested that there are a number of implications for flood management. he first of these is to recognise that the catchment is a system. If we consider the functioning of the catchment; it is a dynamic system in which there are exchanges and movements of sediment, water an...

2003
P. J. Johnes

A manageable, relatively inexpensive model was constructed to predict the loss of nitrogen and phosphorus from a complex catchment to its drainage system. The model used an export coefficient approach, calculating the total nitrogen (N) and total phosphorus (P) load delivered annually to a water body as the sum of the individual loads exported from each nutrient source in its catchment. The exp...

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