A spatial model for a stream networks of Citarik River with the environmental variables: potential of hydrogen (PH) and temperature

Indonesian Operations Research Association - International Conference on Operations Research 2017

Bachrudin, A.^1 ; Mohamed, N.B.^2 ; Supian, S.^3 ; Sukono^3 ; Hidayat, Y.^1

Department of Statistics, Faculty of Mathematics and Natuaral Sciences, Universitas Padjadjaran, Indonesia^1

School of Informatics and Applied Mathematics, Universiti Malaysia Terengganu, Malaysia^2

Department of Mathematics, Faculty of Mathematics and Natuaral Sciences, Universitas Padjadjaran, Indonesia^3

关键词: Autocovariance functions;    Convolution kernel;    Environmental variables;    Euclidean distance;    Potential hydrogens;    Root mean squared;    Spatial correlations;    Statistical tools;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/332/1/012002/pdf
DOI  :  10.1088/1757-899X/332/1/012002

来源: IOP

【 摘 要 】

Application of existing geostatistical theory of stream networks provides a number of interesting and challenging problems. Most of statistical tools in the traditional geostatistics have been based on a Euclidean distance such as autocovariance functions, but for stream data is not permissible since it deals with a stream distance. To overcome this autocovariance developed a model based on the distance the flow with using convolution kernel approach (moving average construction). Spatial model for a stream networks is widely used to monitor environmental on a river networks. In a case study of a river in province of West Java, the objective of this paper is to analyze a capability of a predictive on two environmental variables, potential of hydrogen (PH) and temperature using ordinary kriging. Several the empirical results show: (1) The best fit of autocovariance functions for temperature and potential hydrogen (ph) of Citarik River is linear which also yields the smallest root mean squared prediction error (RMSPE), (2) the spatial correlation values between the locations on upstream and on downstream of Citarik river exhibit decreasingly.