Environmental surveys during operation and following removal of the OTEC-1 system off Keahole Point, Hawaii. Final report, January-April 1981
Detailed are two biological chemical cruises off Keahole Point, Hawaii, which took place during (HOTEC-11, January 1981) and immediately after cessation (HOTEC-12, April 1981) of operation of OTEC-1. The objectives of the study were to: (1) compare site specific data taken before OTEC-1 was operating to data taken after OTEC-1 left the site; and (2) perform an analysis of OTEC environmental effects to indicate areas in which future sampling efforts might be expended. Data from temperature, nutrient, phytoplankton and zooplankton analyses taken immediately after OTEC-1 left the site show only minor differences with data taken before OTEC-1 occupied the site (HOTEC-01-06, MSG-82-013). The differences were not significant, and therefore, OTEC-1 had no demonstrable post-operational impacts on these environmental variables. From temperature records the minimum /sup 0/T between surface waters (0-30 m) and 700 m water was about 18/sup 0/C. There was no demonstrable temperature effect due to operation of OTEC-1. Significant increases in near surface water (0 to 70 m) nitrate concentrations were noted at Station 1 (Control) during OTEC-1 operations; while after shut-down no effect was seen. This effect can not be directly attributed to OTEC-1. Increased chlorophyll a standing stock downstream of OTEC-1 indicated some effect of OTEC-1. No toxic effect was noted and primary productivity rates were the same at all stations. The chlorophyll a biomass in the < 5 ..mu..m size fraction was significantly higher at the downstream station. No effect on zooplankton were noted at any station. Abundance of ichthytoplankton taxa are reported but there is insufficient data to perform an analysis.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Noda (E.K.) and Associates, Honolulu, HI (USA); Oceanic Inst., Waimanalo, HI (USA); Hawaii Univ., Kaneohe (USA). Hawaii Inst. of Marine Biology
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5352516
- Report Number(s):
- DOE/NBM-2016727; ON: DE82016727
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
Similar Records
Current data from the Keahole Point, Hawaii, OTEC benchmark sites, June 1980-April 1981. Part I. June 1980-December 1980; Part II. December 1980-April 1981
Enhanced test facility for OTEC at Keahole Point
Related Subjects
54 ENVIRONMENTAL SCIENCES
COASTAL WATERS
NUTRIENTS
PLANKTON
TEMPERATURE DISTRIBUTION
HAWAII
OCEAN THERMAL POWER PLANTS
ENVIRONMENTAL EFFECTS
AMMONIA
BIOASSAY
CHLOROPHYLL
EXPERIMENTAL DATA
NITRATES
PACIFIC OCEAN
PHOSPHATES
PRODUCTIVITY
SAMPLING
SILICATES
TOXICITY
AQUATIC ORGANISMS
CARBOXYLIC ACIDS
DATA
FEDERAL REGION IX
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NORTH AMERICA
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
POWER PLANTS
SEAS
SILICON COMPOUNDS
SOLAR POWER PLANTS
SURFACE WATERS
THERMAL POWER PLANTS
USA
140800* - Solar Energy- Ocean Energy Systems
520500 - Environment
Aquatic- Site Resource & Use Studies- (-1989)