THE DEVELOPMENT OF SUBWATERSHED POLLUTION PREVENTION INITIATIVES IN THE ROUGE RIVER WATERSHED

Abstract. With the raise of environmental protection awareness, applying models to control NPS (non-point source) pollution has become a key approach for environmental protection and pollution prevention and control in China. In this study, we implanted the semi-conceptual model SWAT (Soil and Water Assessment Tool) using information on rainfall runoff, land use, soil and slope. The model was used to quantify the spatial loading of NPS nutrient total nitrogen (TN) and total phosphorus (TP) to the Huntai River Watershed (HTRW) under two scenarios: without and with projected buffer zones of approximately 1 km within both banks of the Huntai, Taizi and Daliao river trunk streams and 5 km around the reservoirs. Current land-use types within the buffer zone were varied to indicate the natural ecology and environment. The Nash–Sutcliffe efficiency coefficient (ENS) and R2 for flow and predicted nutrient concentrations (TN and TP) in a typical hydrological station were both greater than 0.6, and the relative deviation (|Dv|) was less than 20 %. Under the status quo scenario (SQS), the simulated soil erosion in the HTRW per year was 811 kg/ha, and the output loadings of TN and TP were 19 and 7 kg/ha, respectively. The maximum loadings for TN and TP were 365 and 260 kg/ha, respectively. Under environmental protection scenarios (EPS), the TN and TP pollutant loadings per unit area were reduced by 26 % and 14 % annually, respectively. Loading analysis showed that land-use type is a key factor controlling NPS pollution. The NPS pollutant loading decreased under the simulated EPS, indicating that environmental protection measures may reduce the NPS pollutant loading in HTRW. The 22 % pollutant reduction under the EPS. We finally quantified the ratio of the land area lost to agricultural production compared with that lost to ecosystem services. We calculated the agricultural yield elasticity and concluded that the corresponding crop yield would be reduced by 2 % when the land area for ecosystem services in the basin increased by 1 % under the EPS.

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Discovery, dispersal, and genetic diversity of Rhyacophila lobifera Betten, 1934 (Trichoptera: Rhyacophilidae) in southeast Michigan, USA

Zoosymposia ◽

10.11646/zoosymposia.14.1.19 ◽

2019 ◽

Vol 14 (1) ◽

pp. 177-188

Author(s):

ABIGAIL J. FUSARO ◽

BRUCE McCULLOCH ◽

SALLY PETRELLA ◽

VELON WILLIS

Keyword(s):

Dna Barcode ◽

Biotic Index ◽

Upper Midwest ◽

Dispersal Patterns ◽

River Watershed ◽

Mitochondrial Coi ◽

Genetic Patterns ◽

Scale Population ◽

Huron River ◽

Rouge River

Rhyacophila lobifera Betten, 1934 has been previously documented in the upper Midwest states of Ohio, Indiana, and Illinois, and the province of Ontario. Here we report on the diversity of this species in the Rouge and Huron River watersheds using DNA barcode-verified identifications to confirm the first known Michigan record of this species, with collection from the lower Rouge River in 2003 and again in 2008. Since first detection, we document that the range of R. lobifera in the Rouge River watershed has expanded to include at least one additional site on the Lower Branch and five sites on the Middle Branch (Johnson Creek), as well three sites in the neighboring Huron River watershed. Our sequence analysis of the mitochondrial COI barcode gene region suggests a fine scale population structure in these watersheds, with haplotype partitioning congruent with proposed dispersal patterns based on first records at each site. Ranking as a 4 on the Hilsenhoff's biotic index—an intermediate level of water quality tolerance, discovery of R. lobifera in an urbanized southeast Michigan watershed is not unexpected, but population genetic patterns lend insight into its recent range expansion.

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The rouge river watershed pollution by trace elements: atmospheric depositions and emission sources

Water Science & Technology ◽

10.2166/wst.1996.0514 ◽

1996 ◽

Vol 33 (4-5) ◽

pp. 267-275 ◽

Cited By ~ 1

Author(s):

Nicola Pirrone ◽

Gerald J. Keeler

Keyword(s):

Trace Elements ◽

Wet Deposition ◽

Steady Increase ◽

Deposition Flux ◽

Emission Sources ◽

River Watershed ◽

Atmospheric Depositions ◽

Wet Deposition Flux ◽

Atmospheric Inputs ◽

Rouge River

Atmospheric inputs of trace elements to the Rouge River watershed by particle dry deposition and aerosol scavenging by precipitation were presented along with the annual emission of trace elements to the atmosphere by emission source category. A dynamic physical-based model was used to evaluate the dry and wet deposition flux of particle-segregated trace elements and its temporal and spatial variation in the Rouge River watershed from 1982 to 1992. Annual emissions of trace elements to the atmosphere were estimated assuming a controlled status for all the emission sources which include coal and oil combustion utilities, iron-steel manufacturing plants, metal production from primary and secondary pyrometallurgical processes, cement manufacturing, solid waste and sewage sludge incinerators. In general, there is a good agreement between the trend in the atmospheric input (dry + wet deposition fluxes) to the Rouge River watershed and that in the annual emission of trace elements to the atmosphere with r2 in the range of 0.84 to 0.98. Atmospheric inputs and emissions are following downward trends for Pb, whereas for Cd, Cr, Ni and Hg show a steady increase since 1987/1988. The modeled long-term average of the total (dry + wet) deposition flux of trace elements to the Rouge River watershed is 3167 ± 2548 g km−2 yr−1 for Pb, 397 ± 132 g km−2 yr−1 for Ni, 350 ± 160 g km−2 yr−1 for Cr, 130 ± 39 g km−2 yr−1 for Cd, and 8.6 ± 3.7 g km−2 yr−1 for Hg.

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