Natural and diverted low-flow duration discharges for streams affected by the Waiahole Ditch System, windward O`ahu, Hawai`i

Yeung, Chiu W.; Fontaine, Richard

doi:10.3133/sir20065285

Cited by 2 publications

(4 citation statements)

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“…Oki and others (2006) characterized natural low-flow availability in Punaluʻu Stream, Oʻahu, and examined the effects of streamflow diversions on habitat availability for native stream fauna. Yeung and Fontaine (2007) described natural and regulated low flows for streams that were affected by the Waiāhole Ditch System in northeast O'ahu. Fontaine (2012) quantified natural and regulated low-flow characteristics for streams in Waipi'o Valley, Island of Hawai'i (herein referred to as Hawai'i), and evaluated implications of proposed streamflow diversion strategies on low flows.…”

Section: Previous Low-flow Investigationsmentioning

confidence: 99%

“…4) are excluded from the analysis because of the complex flow diversions associated with the Waiāhole Ditch. These complex flow diversions include the following: (1) additional unknown amounts of surface water pumped into the diversion system during 1951-69, (2) flow releases from the ditch to the affected streams during 1951-69 and 1999-2004, (3) closure of surface-water diversion intakes during the mid-1980s, and (4) changes in the development tunnels for several of the affected streams (Yeung and Fontaine, 2007). On Moloka'i, only data collected prior to November 1960 were used for stations 16405500 and 16408000 on Waikolu Stream because of the unknown effects associated with diversions by the Molokai Tunnel.…”

Section: Natural (Unregulated) Streamflow Datamentioning

confidence: 99%

“…For these cases, streamflow data under natural flow conditions for the streams involved were limited or unavailable at the time of the disputes. Consequently, the U.S. Geological Survey (USGS), in cooperation with various agencies, provided the information necessary for planning and management of the water resource (see Gingerich, 2005;Oki and others, 2006;Yeung and Fontaine, 2007;Oki and others, 2010b).…”

Section: Introductionmentioning

confidence: 99%

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Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi

Cheng¹

2016

Scientific Investigations Report

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Statistical models were developed to estimate natural streamflow under low-flow conditions for streams with existing streamflow data at measurement sites on the Islands of Kaua'i, O'ahu, Moloka'i, Maui, and Hawai'i. Streamflow statistics used to describe the low-flow characteristics are flow-duration discharges that are equaled or exceeded between 50 and 95 percent of the time during the 30-year base period 1984-2013. Record-augmentation techniques were applied to develop statistical models relating concurrent streamflow data at the measurement sites and long-term data from nearby continuous-record streamflow-gaging stations that were in operation during the base period and were selected as index stations. Existing data and subsequent low-flow analyses of the available data help to identify streams in under-represented geographic areas and hydrogeologic settings where additional data collection is suggested. Low-flow duration discharges were estimated for 107 measurement sites (including long-term and short-term continuous-record streamflow-gaging stations, and partial-record stations) and 27 index stations. The adequacy of statistical models was evaluated with correlation coefficients and modified Nash-Sutcliff coefficients of efficiency, and a majority of the low-flow duration-discharge estimates are satisfactory based on these regression statistics. Molokaʻi and Hawaiʻi have the fewest number of measurement sites (that are not located on ephemeral stream reaches) at which flow-duration discharges were estimated, which can be partially explained by the limited number of index stations available on these islands that could be used for record augmentation. At measurement sites on some tributary streams, low-flow duration discharges could not be estimated because no adequate correlations could be developed with the index stations. These measurement sites are located on streams where duration-discharge estimates are available at longterm stations at other locations on the main stream channel to provide at least some definition of low-flow characteristics on that stream. In terms of general natural streamflow data availability, data are scarce in the leeward areas for all five islands as many leeward streams are dry or have minimal flow. Other under-represented areas include central Oʻahu, central Maui, and southeastern Maui. Not all streamflow data that USGS has gathered are easily accessible, particularly historic streamflow measurements made at locations that are not continuously gaged. As part of this study, data from continuous-record streamflow-gaging stations, partial-record stations, and miscellaneous dischargemeasurement sites (such as seepage-run sites) are compiled

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Section: Previous Low-flow Investigationsmentioning

confidence: 99%

Section: Natural (Unregulated) Streamflow Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi

Cheng¹

2016

Scientific Investigations Report

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show abstract

“…Oki and others (2006) characterized natural low-flow availability in Punalu'u Stream, O'ahu, and examined the effects of streamflow diversions on habitat availability for native stream fauna. Yeung and Fontaine (2007) described natural and regulated low flows for streams that were affected by the Waiähole Ditch System in northeast O'ahu. Oki and others (2010) assessed the effects of streamflow diversions on low flows, groundwater recharge, habitat for native stream fauna, and instream temperatures for streams in the Nä Wai 'Ehä area, Maui.…”

Section: Previous Low-flow Investigationsmentioning

confidence: 99%

Low-flow characteristics of streams in the Lahaina District, West Maui, Hawai'i

Cheng¹

2014

Scientific Investigations Report

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In Hawai'i, the diversion of surface water during low-flow conditions greatly influences water availability for ecosystems, aquatic biota, and people. Existing diversion structures are capable of capturing a majority of the low flow in the streams, leaving some downstream reaches dry, which can adversely affect traditional Hawaiian practices, stream ecology, water quality, recreational activities, and aesthetics. Competition for limited water resources for offstream and instream uses has led to costly litigation over rights to the water between those currently diverting the water and those desiring sufficient flow in the stream for instream uses. Information on natural stream discharge during low-flow conditions is needed to effectively manage Hawai'i's surfacewater resources for current and future uses.

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Natural and diverted low-flow duration discharges for streams affected by the Waiahole Ditch System, windward O`ahu, Hawai`i

Cited by 2 publications

References 0 publications

Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi

Low-flow characteristics for streams on the Islands of Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi

Low-flow characteristics of streams in the Lahaina District, West Maui, Hawai'i

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