Stormwater Impacts to Hawaii’s Coastal Waters
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A Call to Update Hawaii’s Water Quality Standards
This is a video of the presentation to the Pacific Water Quality Conference in February 2021 Watch the Video
Kawai Nui Waterflow Restoration
This is an analysis of the potential methods and locations for water transfer from Kawainui Marsh to Kawainui Stream in the Kaelepulu system. Because the marsh water surface is a few feet higher than Kawainui Stream no pumps are required to obtain flow. Read More
Hawaii’s Stormwater Challenges
States, cities, and municipalities across the US have made great strides in meeting Clean Water Act requirements to control both point source and non-point source pollutant loads to public waters. Honolulu has, unfortunately, failed to keep up with other municipalities and the State DOH appears unable to enforce strict NPDES permit requirements upon the City. Read More
Kaelepulu Water Quality from City FOIA’d Data
Following the publication of the City’s 2008 Kaelepulu Drainage Improvement Study produced by AECom, the City decided it needed better data to design the necessary water quality improvement features. Read More
Natural History and Water Quality
of the Kaelepulu Estuary
The Ka‘elepulu watershed once incorporated all of the present-day Kawainui (7,175 acres) and Kaelepulu (3,450 acres) watersheds. With only one natural outlet, large storm events would commonly cause flooding across the low elevation sand dune separating the waterbodies from Kailua Bay. Read PDF
Stream Mouth/Kailua Beach Water Quality
Kaʻelepulu Estuary on Oʻahu’s eastern shore was once a highly productive area. Housing development in the area rerouted natural stream flow to prevent flooding resulting in an accreted sand berm at the stream mouth and 0.54 km2 (134-acre) area of stagnant water. Read PDF
Kawai Nui Marsh Invasive Aquatic Plant Study
The State of Hawaii’s Department of Land and Natural Resources, natural resource managers of Kawai Nui Marsh, have a long-term objective to control invasive plants and increase habitat for endangered Hawaiian waterfowl within the marsh. In support of this objective, this study completed a botanical and habitat survey of the marsh to quantify the distribution of native and alien plants within the marsh. Read PDF
2008 Stormwater Best Management Practices Plan
This stormwater best management practices (BMPs) plan is prepared for the City and County of Honolulu (City), Department of Environmental Services (ENV) and evaluates four major outlets, as defined in 40 CFR Part 123 Subpart B, and their corresponding drainage areas. The major outlets are associated with the Windward District in the Kailua Watershed and discharge into Kaelepulu Pond. Read PDF
Click here to see the Completion Summary