00389549

Component

http://onlinepubs.trb.org...s/trr/1983/948/948-004.pdf

https://scholar.google.co...ford&publication_year=1983

Eighteen artificial wetlands were evaluated in North Dakota in 1979 and 1980. Several recommendations are presented for artificial-wetland design and construction based on both the results of the 2-year study and the habitat requirements of breeding waterfowl. It is recommended that (a) a series of wetlands of varying sizes be built rather than one large wetland; (b) multisided, variable-depth wetlands be excavated instead of rectangular, uniformly deep borrow pits; (c) bank gradients not exceed a 10:1 to 20:1 slope; (d) nesting islands be constructed in the center of the wetland when possible; (e) adjacent upland areas be seeded with dense cover to support nesting and reduce erosion and runoff; (f) if necessary, wetlands be sealed with a clay layer to retain water; and (g) topsoil be set aside and respread to provide an adequate substrate for the growth of aquatic plants. Some suggestions for future research on artificial wetlands are also presented. (Author)

Publication of this paper sponsored by Committee on Hydrology, Hydraulics, and Water Quality. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

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pp 21-25

1983

Transportation Research Record

0309036690

Print

Figures (3) ; Maps (3) ; References (29)

Birds; Construction; Depth; Design; Erosion control; Excavation; Highway grades; Slopes; Specifications; Topsoil; Wetlands

Requirement

North Dakota

Construction; Design; Environment; Highways; Hydraulics and Hydrology; Planning and Forecasting; I21: Planning of Transport Infrastructure

TRIS, TRB

Nov 30 1984 12:00AM

• CONTROLLING ACIDIC-TOXIC METAL LEACHATES FROM SOUTHERN APPALACHIAN CONSTRUCTION SLOPES: MITIGATING STREAM DAMAGE
• GUIDE FOR ASSESSING WATER-QUALITY IMPACTS OF HIGHWAY OPERATIONS AND MAINTENANCE
• HIGHWAY IMPACTS ON WETLANDS: ASSESSMENT, MITIGATION, AND ENHANCEMENT MEASURES
• HYDRAULIC DESIGN OF STORMWATER PUMPING STATIONS: THE EFFECT OF STORAGE
• IMPACT OF BRIDGING ON FLOODPLAINS
• Innovative Technique for Preliminary Highway Location
• ROADSIDE EROSION CAUSES AND FACTORS: MINNESOTA SURVEY ANALYSIS
• SCOUR AT CULVERT OUTLETS IN MULTIBED MATERIALS
• SOIL EROSION STUDY OF EXPOSED HIGHWAY CONSTRUCTION SLOPES AND ROADWAYS