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| Project Name: | Reducing Nonpoint Source Pollution from Sediments and Herbicides in Orchards in the Kaiaka–Waialua HUA |
| ASO Log No.: | 96-440 |
| Start/End Date: | January 1996 to April 1997 |
| Federal Funds: | $23,160.00 |
| Matching Funds: | $16,500.00 |
| Contractor: | Carl Evensen University of Hawaii – CTAHR Department of Natural Resources and Environ. Management 1910 East-West Road, Sherman Lab Honolulu, HI 96822 Phone: (808) 956-8825 |
| Background/ Overview: |
As the former Waialua Sugar Company began a transition from sugarcane production to alternative agricultural uses, an opportunity arose to encourage the implementation of agricultural practices that protect the environment at the onset of these ventures. Agricultural land has the potential to contribute sediment, nutrient/fertilizers, toxins. pathogens, pH and fresh water flow into the ocean. Data from representative agricultural locations in Hawaii have revealed that sediment movements is the mahor nonpoint source pollution problem. |
| Objectives/Goals: | Demonstrate the use of cover crops in orchard crops for erosion control and weed suppression; advise Dole Food Company on modifying cover crop planting equipment so that it performs with precision planting in inter-rows of coffee orchards; determine the reduction in herbicide applications and estimated reductions in soil loss associated with orchards in the Kaiaka – Waialua HUA; and provide opportunities for transferring this technology to other orchard growers in the state by making presentations at conferences, holding field days, and by preparing extension publications. |
| Methods Employed: | Plant lychee and coffee demonstration sites with six grass species. Conduct crop and weed rating and monitor data. |
| Pollutants of Concern: | Sediment, herbicides |
| Watershed: | Waialua, Kiikii, Poamoho, Kaukonahua, Paukaulia, Opaeula, Helemano, Anahulu, Kawailoa, Kawaiiki, Loko Ea and Keamanea Watersheds, island of Oahu |
| Size of Project: | 110 acres, along Kamehameha Highway between Wahiawa and Waialua |
| Affected Water Bodies: | Kaiaka and Waialua Bays |
| Deliverables: | Final Report |
