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Physical Sciences and Mathematics

Portland State University

Dissertations and Theses

Autocorrelation (Statistics)

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Spatial Statistical Approaches To Water Quality Modelling, Janardan Mainali Jul 2020

Spatial Statistical Approaches To Water Quality Modelling, Janardan Mainali

Dissertations and Theses

This dissertation aims to advance the existing knowledge related to spatial modeling of water quality by exploring and introducing innovative approaches to different spatial conceptualizations for water quality modeling and incorporating upstream-downstream relations in geographically weighted regression. By carrying out a systematic literature review of four different classes of spatial models in Chapter One, this dissertation identifies the following major research gaps: lack of incorporation of multiscale processes, not enough emphasis on spatial weights matrices, and unavailability of upstream-downstream relationships in geographically weighted regressions. Chapters Two and Three were designed to address these gaps in the literature. In Chapter Two, …