Spatial Distribution Regularity of Water Quality Parameters of Yangzong Lake in Summer Based on Spatial Interpolation Algorithm

SUN Hui-ling; LIAO Ze-bo; DUAN Li-zeng; HONG Liang

doi:10.11988/ckyyb.20150973

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Journal of Changjiang River Scientific Research Institute ›› 2017, Vol. 34 ›› Issue (3) : 30-34. DOI: 10.11988/ckyyb.20150973

WATER RESOURCES AND ENVIRONMENT

Spatial Distribution Regularity of Water Quality Parameters of Yangzong Lake in Summer Based on Spatial Interpolation Algorithm

SUN Hui-ling^1,2, LIAO Ze-bo¹, DUAN Li-zeng^1,2, HONG Liang^1,3

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Abstract

Water quality parameter is an important index reflecting the ecological environment of lakes. Traditional random sampling method for the spatial distribution of water quality parameters is restrictive in scale, but the development of geostatistics presents an effective facility to accurately describe the spatial structure of water quality parameters of lake. In order to obtain the spatial distribution of water quality parameters of surface water of Yangzong Lake in summer, we analyzed six water quality parameters (pH value, total chlorophyll-a content, turbidity, dissolved oxygen concentration, electric conductivity, and phycocyanin) by the Kriging interpolation algorithm and the Distance Weighted Inverse (IDW) spatial interpolation algorithm. Results show the surface water of Yangzong Lake in summer experienced a long period of water cycle and a significant spatial heterogeneity of water quality parameters, in particular, total chlorophyll-a content, turbidity and phycocyanin content. The southern area of Yangzong Lake suffers from severe human activity disturbance and pollution, with high concentrations of phycocyanin and dissolved oxygen; while the northern area of Yangzong Lake is more influenced by industrial pollution, with turbidity in this area reaching the peak value. The results of electrical conductivity and pH values are more affected by the ferric salt coagulation of arsenic removal.

Key words

Yangzong Lake / water quality parameters / Kriging interpolation method / inverse distance weighted interpolation / spatial heterogeneity

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SUN Hui-ling, LIAO Ze-bo, DUAN Li-zeng, HONG Liang. Spatial Distribution Regularity of Water Quality Parameters of Yangzong Lake in Summer Based on Spatial Interpolation Algorithm[J]. Journal of Changjiang River Scientific Research Institute. 2017, 34(3): 30-34 https://doi.org/10.11988/ckyyb.20150973

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