Abstract
While wetlands are usually used as a natural approach to remove biodegradable pollutants in surface water, their purification efficiencies coupled with their aesthetic features are of less concern. The water quality, plant landscape, acoustic environment and odour indicators were investigated in the surface water inlet and outlet of the Fujin National Wetland Park (FNWP), restored from farmlands in Northeast China. Major concentrations of pollutants in the inlet and the outlet subjected to surface flow wetland treatment were monitored, and the removal efficiencies were calculated based on 54 water samples (6 sites×3 seasons×3 replicates). The results showed that the total nitrogen (TN) and organic carbon in surface water decreased significantly after the wetland treatment, while the total phosphorus (TP) did not decrease significantly. The removal efficiencies for TN and BOD5 changed seasonally and reached 69.08% and 60.44%, respectively. An ecological aesthetic index (EAI) was developed based on the trophic state index coupled with plant landscape, acoustic and odour indicators, and the calculated EAI showed that the outlet delivered a more aesthetically harmonious appearance than the inlet in spring and autumn, but not in summer. Based on the current aquatic macrophyte species and documented purification efficiencies in FNWP, we recommend an improved ecological aesthetic management approach that utilizes and arranges diverse native plants from the surrounding wetlands (e.g. Scirpus validus) in addition to local Nelumbo nucifera, Nymphaea tetragona and Myriophyllum spicatum, and conserves the indicative and endangered species (Aldrovanda vesiculosa), from the visual appeal of the waterscape.
Highlights
ObjectivesThe objectives of this paper were (1) to investigate the seasonal surface water purification efficiencies of a typical rebuilt wetland returned from farmland; (2) to assess their ecological aesthetic index (EAI) based on water quality coupled with plant, sound and odour indicators; and (3) to improve the holistic perception effect of the wetland park to cater to the demands of individuals with an aesthetic perspective
We explored the effects of aquatic plants on surface water quality through an ecological aesthetic perspective
The objectives of this paper were (1) to investigate the seasonal surface water purification efficiencies of a typical rebuilt wetland returned from farmland; (2) to assess their ecological aesthetic index (EAI) based on water quality coupled with plant, sound and odour indicators; and (3) to improve the holistic perception effect of the wetland park to cater to the demands of individuals with an aesthetic perspective
Summary
The objectives of this paper were (1) to investigate the seasonal surface water purification efficiencies of a typical rebuilt wetland returned from farmland; (2) to assess their ecological aesthetic index (EAI) based on water quality coupled with plant, sound and odour indicators; and (3) to improve the holistic perception effect of the wetland park to cater to the demands of individuals with an aesthetic perspective
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