Modeling Fecal Bacteria in Oregon Coastal Streams Using Spatially Explicit Watershed Characteristics

Using spatially explicit indicators to investigate watershed characteristics and stream temperature relationships

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.02.042 ◽

2016 ◽

Vol 551-552 ◽

pp. 376-386 ◽

Cited By ~ 13

Author(s):

Zbigniew J. Grabowski ◽

Eric Watson ◽

Heejun Chang

Keyword(s):

Stream Temperature ◽

Spatially Explicit ◽

Watershed Characteristics

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Spatiotemporal Evaluation of Water Quality and Hazardous Substances in Small Coastal Streams According to Watershed Characteristics

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph19020634 ◽

2022 ◽

Vol 19 (2) ◽

pp. 634

Author(s):

Han-Saem Lee ◽

Su-Jin Lim ◽

Byung-Ran Lim ◽

Hong-Seok Kim ◽

Heung-Soo Lee ◽

...

Keyword(s):

Water Quality ◽

Volatile Organic Compounds ◽

Organic Compounds ◽

Urban Areas ◽

Hazardous Substances ◽

Small Scale ◽

Watershed Characteristics ◽

Volatile Organic ◽

Coastal Streams ◽

Agricultural Areas

In this study, spatial and temporal changes of eight water quality indicators and 30 types of hazardous substances including volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), pesticides, and inorganic matters for the small coastal streams along the West Coast of South Korea were investigated. In coastal streams with clear seasonal changes in water quality, larger watershed areas led to greater contamination by particulate matter (i.e., suspended solids, r = 0.89), and smaller watershed areas led to greater contamination by organic matter (i.e., BOD, r = −0.78). The concentration of VOCs and pesticides was higher in agricultural areas, and those of SVOCs and metals were often higher in urban areas. According to the principal component analysis (PCA), during the wet season, the fluctuation in the water quality of coastal streams was higher in urban areas than in agricultural areas. Furthermore, coastal streams in residential areas exhibited higher levels of SVOCs, and those in industrial areas exhibited higher levels of metallic substances. Based on these results, the spatial and temporal trends of water quality and hazardous substances were obtained according to watershed characteristics, thereby clarifying the pollution characteristics of small-scale coastal streams and the major influencing factors.

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Intrinsic influences on establishment and dispersal success in fragmented landscapes: A spatially-explicit individual-based approach

10.1603/ice.2016.104469 ◽

2016 ◽

Author(s):

Audrey Lustig

Keyword(s):

Spatially Explicit ◽

Fragmented Landscapes ◽

Dispersal Success

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Agent-Based Computational Model

10.23943/princeton/9780691158884.003.0003 ◽

2017 ◽

Cited By ~ 2

Author(s):

Joshua M. Epstein

Keyword(s):

Computational Model ◽

Bounded Rationality ◽

Time Scales ◽

Spatially Explicit ◽

Agent Based ◽

Affective Component ◽

Elementary Type ◽

Social Component ◽

Different Time Scales

This part describes the agent-based and computational model for Agent_Zero and demonstrates its capacity for generative minimalism. It first explains the replicability of the model before offering an interpretation of the model by imagining a guerilla war like Vietnam, Afghanistan, or Iraq, where events transpire on a 2-D population of contiguous yellow patches. Each patch is occupied by a single stationary indigenous agent, which has two possible states: inactive and active. The discussion then turns to Agent_Zero's affective component and an elementary type of bounded rationality, as well as its social component, with particular emphasis on disposition, action, and pseudocode. Computational parables are then presented, including a parable relating to the slaughter of innocents through dispositional contagion. This part also shows how the model can capture three spatially explicit examples in which affect and probability change on different time scales.

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