Geostatistically based optimization of a rainfall monitoring network extension: case of the climatically heterogeneous Tunisia

被引:26
作者
Feki, Haifa [1 ]
Slimani, Mohamed [2 ]
Cudennec, Christophe [3 ,4 ]
机构
[1] Higher Sch Engineers Medjez el Beb, Dept Hydraul, Route Kef Km5, Medjez El Beb 9070, Tunisia
[2] Natl Inst Agron Tunisia, Sci & Tech Water Lab, Tunis 1082, Tunisia
[3] AgroCampus Ouest, UMR Sol Agro & Hydro Syst Spatialisat 1069, F-35000 Rennes, France
[4] INRA, UMR Sol Agro & Hydro Syst Spatialisat 1069, F-35000 Rennes, France
来源
HYDROLOGY RESEARCH | 2017年 / 48卷 / 02期
关键词
geostatistics; kriging variance; optimization; rainfall network; spatial variability; Tunisia; REFERENCE EVAPOTRANSPIRATION; GAUGE NETWORKS; DESIGN; INTERPOLATION; INTENSITY; ENTROPY; CHINA;
D O I
10.2166/nh.2016.256
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Rainfall data are an essential input for many simulation models. In fact, these latter have a decisive role in the development and application of rational water policies. Since the accuracy of the simulation depends strongly on the available data, the task of optimizing the monitoring network is of great importance. In this paper, an application is presented aiming at the evaluation of a precipitation monitoring network by predicting monthly, seasonal, and interannual average rainfall. The method given here is based on the theory of the regionalized variables using the well-known geostatistical variance reduction method. The procedure, which involves different analysis methods of the available data, such as estimation of the interpolation uncertainty and data cross validation, is applied to a case study data set in Tunisia in order to demonstrate the potential for improvement of the observation network quality. Root mean square error values are the criteria for evaluating rainfall estimation, and network performance is discussed based on kriging variance reduction. Based on this study, it was concluded that some sites should be dropped to eliminate redundancy and some others need to be added to the existing network, essentially in the center and the south, to have a more informative network.
引用
收藏
页码:514 / 541
页数:28
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