Sediment and Nutrient Export Estimation under InVEST software suite A case study of Upper Ing Watershed, Payao, Thailand (original) (raw)

2020

Abstract

A variety of land use and its change plays a vital role in the water quality of lakes. Especially, urban and built-up and cultivated areas influence the water quality within the lake basin. To understand sediment and nutrient processes using sediment delivery ratio (SDR) and nutrient delivery ratio (NDR) models under the InVEST software suite, sediment export and nutrient export were examined in the Upper Ing watershed. The specific objective was to estimate sediment and nutrient exports and to compare their results. The research methodology consisted of three components: data collection and preparation, sediment export estimation and nutrient export estimation, and sediment and nutrient export comparison. The results discovered that average sediment export in Upper Ing Watershed in 2009 and 2015 were about 116 tons and 47 tons, respectively. This finding indicates the effect of rainfall erosivity sediment export in the watershed. Meanwhile, average nitrogen (N) export in 2009 and 2...

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