نتایج جستجو برای: catchment peak discharge therefore

تعداد نتایج: 856892  

2002
Dagnachew Legesse Christine Vallet-Coulomb Françoise Gasse

A hydrological modelling at a catchment scale has been used to investigate the impact of climatic and land use change on water resources in data scarce Tropical Africa using a distributed precipitation-runoff modelling system. The model divides a catchment into homogeneous hydrological response units, providing the ability to impose changes in climate or land use spatially. Model parameters wer...

Journal: :Remote Sensing 2022

Understanding the change in hydrological response due to urban dynamics is important for better flood preparedness and future sustainable planning. This study investigated influence of land cover on spatiotemporal changes peak discharge volume within a rapidly urbanizing catchment located Beijing, China. We used Landsat satellite data ranging from 1986 2017 monitor quantify growth. Moreover, Hy...

2003
Joseph Holden Tim P. Burt

[1] Blanket peat catchments exhibit flashy regimes, but little is known about the exact nature of runoff production processes within these catchments. Catchment, hillslope, and plot-scale monitoring results are presented from the blanket peats of the northern Pennines, United Kingdom. Catchment efficiency for three study catchments with areas of 11.4 km, 0.83 km, and 0.44 km were 72%, 77%, and ...

2015
M. Adamovic I. Braud F. Branger J. W. Kirchner

This study explores how catchment heterogeneity and variability can be summarized in simplified models, representing the dominant hydrological processes. It focuses on Mediterranean catchments, characterized by heterogeneous geology, pedology and land use, as well as steep topography and a rainfall regime in which summer droughts contrast with high-rainfall periods in autumn. The Ardèche catchm...

2014
J. W. Kirchner

This study explores how catchment heterogeneity and variability can be summarized in simplified models, representing the dominant hydrological processes. It focuses on Mediterranean catchments, characterized by heterogeneous geology, pedology, and land use, as well as steep topography and a rainfall regime in which summer 5 droughts contrast with high-rainfall periods in autumn. The Ardèche cat...

2014
Cheng Yao Ke Zhang Zhongbo Yu Zhijia Li Qiaoling Li

Improving the predictive capabilities of rainfall-runoff models in ungauged catchments is a challenging task but has important theoretical and practical significance. In this study, we investigated the predictive capabilities of the conceptual Xinanjiang model (XAJ), which is widely used for flood forecasting and simulation in China, in ungauged catchments. We further produced a hybrid rainfall...

2006
J. Olsson

The propagation of spatio-temporal errors in precipitation estimates to runoff errors in the output from the conceptual hydrological HBV model was investigated. The study region was the Gimån catchment in central Sweden, and the period year 2002. Five precipitation sources were considered: NWP model (H22), weather radar (RAD), precipitation gauges (PTH), and two versions of a mesoscale analysis...

Journal: :Journal of Geoscience and Environment Protection 2022

Although Tanzania has a large land suitable for irrigation development, only 4.2% of the arable which is potential been developed. Mbarali District characterized by commercial and small-scale activities paddy production. Currently, surface water availability in dwindling due to high demands. Inadequate studies that estimate one underlying factors lack development many parts including District. ...

2016
Andy Ward Molly Moran Athanasios Loukas

Channel-forming discharges typically are associated with recurrence intervals less than five years and usually less than two years. However, the actual frequency of occurrence of these discharges is often several times more frequent than the statistical expectation. This result was confirmed by using the Log-Pearson Type 3 statistical method to analyze measured annual series of instantaneous pe...

2011
S. Simoni S. Padoan D. F. Nadeau M. Diebold A. Porporato G. Barrenetxea F. Ingelrest M. Vetterli M. B. Parlange

[1] A field measurement campaign was conducted from June to October 2009 in a 20 km catchment of the Swiss Alps with a wireless network of 12 weather stations and river discharge monitoring. The objective was to investigate the spatial variability of meteorological forcing and to assess its impact on streamflow generation. The analysis of the runoff dynamics highlighted the important contributi...

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