Journal ArticleDOI
Assessment of the impact of meteorological network density on the estimation of basin precipitation and runoff: a case study
André St-Hilaire,Taha B. M. J. Ouarda,Marius Lachance,Bernard Bobée,Jocelyn Gaudet,Claude Gignac +5 more
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In this article, the authors investigated the impact of network density at two temporal scales, i.e. for the estimation of total annual precipitation and for the estimate of daily precipitation during specific rain events.Abstract:
In recent years in North America, a number of government agencies and industries have begun to reinvest in meteorological networks. This investment must be based on sound scientific advice. Increased meteorological station network density can be beneficial for a number of purposes, including flood forecasting. This study aimed at investigating the impact of network density at two temporal scales, i.e. for the estimation of total annual precipitation and for the estimation of daily precipitation during specific rain events. This was done using kriging as a means to estimate the spatial distribution and variance of rainfall. Kriged precipitation from two network scenarios (sparse and dense) were used as input into the HSAMI hydrological model and simulations were compared on five drainage basins in the Mauricie area (Qu´ ebec, Canada). A comparison of the distribution of total annual precipitation interpolated from the two network scenarios showed that adding stations changed the distribution and magnitude of rainfall in the study area. High precipitation cells were better defined with the denser network, and decreases in the relative spatial variance were observed. Similarly, kriged daily precipitation provided a more defined spatial distribution of rainfall during important rain events of 1999, and variance was also reduced when the denser network was used. Finally, simulations performed with the HSAMI model were generally improved when the precipitation inputs were estimated using a denser station network for most drainage basins studied, as expressed by increased Nash coefficients and a decreased root-mean-square error. Peak flows during important summer flood events were generally better simulated when a denser network was used to calculate the mean daily precipitation used as input. Total cumulated volume estimations during the rain events were also generally improved with a denser network. This study showed that the estimation of variance remains an important tool for rain gauge network design. Moreover, network density was shown to have an important impact on the quality of flow simulations, even when a lumped model is used. Copyright 2003 John Wiley & Sons, Ltd.read more
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Journal ArticleDOI
Developments in hydrometric network design: A review
Ashok K. Mishra,Paulin Coulibaly +1 more
TL;DR: This review starts with precise examples of decline in hydrometric network density, then highlights the increasing requirement of optimal network design in a context of climate and land use changes.
Journal ArticleDOI
Influence of rainfall observation network on model calibration and application
András Bárdossy,Tapash Das +1 more
TL;DR: In this paper, the authors investigated the influence of the spatial resolution of the rainfall input on the model calibration and application by varying the distribution of the raingauge network, and the performance of the hydrological model was analyzed as a function of the rakingauge density.
Journal ArticleDOI
Impact of climate change on the hydrology of St. Lawrence tributaries
TL;DR: In this paper, the St. Lawrence tributaries of the Canadian province of Quebec were modeled with the HSAMI run with six climate series projections and the projected daily climate series were produced using the historical data of a reference period (1961-1990) with a perturbation factor equivalent to the monthly mean difference (temperature and precipitation) between a GCM in the future for three 30-year horizons (2010-2039, 2040-2069; 2070-2099) and the reference period.
Journal ArticleDOI
Assessing the influence of rain gauge density and distribution on hydrological model performance in a humid region of China
Hongliang Xu,Hongliang Xu,Chong-Yu Xu,Chong-Yu Xu,Hua Chen,Hua Chen,Zengxin Zhang,Zengxin Zhang,Lu Li +8 more
TL;DR: In this article, a famous and widely used hydrological model, the Xinanjiang Model, was applied in Xiangjiang River basin to examine the influence of rain gauge density and distribution on the performance of the model in simulating the stream flow.
Journal ArticleDOI
Rain-gauge network evaluation and augmentation using geostatistics
TL;DR: In this article, a geostatistical approach for evaluation and augmentation of an existing rain-gauge network is proposed in which a criterion using ordinary kriging variance is proposed to assess the accuracy of rainfall estimation using the acceptance probability defined as the probability that estimation error falls within a desired range.
References
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Journal ArticleDOI
An Introduction to Applied Geostatistics
TL;DR: In this paper, an Introduction to Applied Geostatistics is presented, with a focus on the application of applied geometrics in the area of geostatistic applications.
Book
An Introduction to Applied Geostatistics
TL;DR: In this paper, Krigeage and continuite spatiale were used for interpolation of a variogramme with anisotropic interpolation reference record created on 2005-06-20, modified on 2011-09-01.
Journal ArticleDOI
Geostatistical approaches for incorporating elevation into the spatial interpolation of rainfall
TL;DR: In this article, three multivariate geostatistical interpolation algorithms for incorporating a digital elevation model into the spatial prediction of rainfall are presented, i.e., simple kriging with varying local means, krigging with an external drift, and colocated cokriging.
Journal ArticleDOI
Optimal selection of number and location of rainfall gauges for areal rainfall estimation using geostatistics and simulated annealing
TL;DR: This paper presents a method for establishing an optimal network design for the estimation of areal averages of rainfall events by using the well known geostatistical variance-reduction method in combination with simulated annealing as an algorithm of minimisation.
Journal ArticleDOI
An entropy approach to data collection network design
Yujuin Yang,Donald H. Burn +1 more
TL;DR: A new methodology for data collection network design employs a measure of the information flow between gauging stations in the network which is referred to as the directional information transfer and non-parametric estimation is used to approximate the multivariate probability density functions required for entropy calculations.
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