Evaluation of major dike-impounded ground-water reservoirs, Island of Oahu

Takasaki, K.J.

doi:10.3133/wsp2217

Cited by 6 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a few widely spaced dikes in a large area of permeable lava-flow aquifer can increase storage by impounding fresh groundwater to high altitudes (fig. 2) (Takasaki and Mink, 1985).…”

Section: Rocks and Their Hydrologic Significancementioning

confidence: 99%

“…The ability of the dike-impounded-groundwater setting to store groundwater diminishes where dikes are so densely clustered that the volume of high-permeability lava flows between the dikes is small (Takasaki and Mink, 1985). Dikes are more densely clustered at the center of rift zones and diminish in abundance toward the margins (Macdonald and others, 1983;Walker, 1987).…”

Section: Dike-impounded-groundwater Settingmentioning

confidence: 99%

“…Dikes are more densely clustered at the center of rift zones and diminish in abundance toward the margins (Macdonald and others, 1983;Walker, 1987). Dike abundance also increases with depth, and at some depth, the effective porosity and permeability of the aquifer probably approaches zero (Takasaki and Mink, 1985;Kauahikaua, 1993;Moore and Trusdell, 1993). In most dike compartments, fresh water probably extends through the entire depth in which groundwater is significantly mobile.…”

Section: Dike-impounded-groundwater Settingmentioning

confidence: 99%

See 2 more Smart Citations

Volcanic aquifers of Hawaiʻi—Contributions to assessing groundwater availability on Kauaʻi, Oʻahu, and Maui

Izuka¹,

Rotzoll²

2023

Professional Paper

View full text Add to dashboard Cite

Geographic names in this report are largely consistent with the U.S. Geological Survey (USGS) Board on Geographic Names (http://geonames.usgs.gov/), including the use of the 'okina (') and kahakō (ˉ) diacritical marks in Hawaiian names. The diacritical marks are not used, however, in anglicized derivations from Hawaiian names (for example, the 'okina appears in the name "Hawai'i" but not in the derivation "Hawaiian"), or where a place name appears without the diacritical marks in an established proper noun or title in a cited reference. Names of geologic formations and features are consistent with the State geologic map by Sherrod and others (2021).Both the entire group of Hawaiian Islands and the largest island in the group are named "Hawai'i." To avoid confusion in this report, the island group is referred to as "Hawai'i" and the largest island is referred to as "Island of Hawai'i." The other islands, including those that are the focus of this report (O'ahu, Maui, and Kaua'i), are simply referred to by their names because there is no potential for confusion with other geographic entities.

show abstract

Section: Rocks and Their Hydrologic Significancementioning

confidence: 99%

Section: Dike-impounded-groundwater Settingmentioning

confidence: 99%

Section: Dike-impounded-groundwater Settingmentioning

confidence: 99%

See 1 more Smart Citation

Volcanic aquifers of Hawaiʻi—Contributions to assessing groundwater availability on Kauaʻi, Oʻahu, and Maui

Izuka¹,

Rotzoll²

2023

Professional Paper

View full text Add to dashboard Cite

show abstract

“…As a consequence, ridges composed of basaltic bedrock with much higher hydraulic conductivity, form the dominant flow units on this side of the island (Figure 1). However, that scenario differs on the windward side of Oʻahu, where Koʻolau rift zone dike swarm intrusions are abundant (Takasaki & Mink, 1985;Walker, 1986Walker, , 1987, making the basaltic bedrock less hydraulically conductive, allowing stream valleys to become important groundwater flow units (Mathioudakis, 2018).…”

mentioning

confidence: 99%

A Multi‐Hydrogeophysical Study of a Watershed at Kaiwi Coast (Oʻahu, Hawaiʻi), using Seismic Ambient Noise Surface Wave Tomography and Self‐Potential Data

Grobbe

Mordret

Barde-Cabusson

et al. 2021

Water Resources Research

View full text Add to dashboard Cite

As a Pacific Island, Hawaiʻi's hydrological processes are influenced by strong spatio-temporal gradients in, and close interactions between, rainfall, land-use, near-surface geological conditions, and complicated subsurface hydrogeology. Due to their volcanic nature, the hydrogeology of Hawaiʻi predominantly consists of basaltic bedrock formations that vary in terms of, for example, the type of lava flow deposit ('A'ā vs. Pāhoehoe), age, and thickness of individual flow units. Several factors, such as the age of the islands and climatic variability, control regolith development, and its characteristics (Ryu et al., 2014;P. Vitousek, 2004).Hawaiian hydrogeology possesses strong spatio-temporal gradients and heterogeneity at a variety of spatial scales (Figure 1). For example, basaltic formations are dominated by both small-and intermediate-scale fractures and large-scale faults that strongly affect chemical fate and transport processes (Deng & Spycher, 2019). Mechanical weathering and chemical alteration create saprolite layers with low hydraulic conductivity, forming barriers to flow (Figure 1) and/or causing groundwater to be trapped in perched formations (Hunt, 1996;Mink & Lau, 1980;Oki, 2005). On the island of Oʻahu, as well as on other Pacific islands, valley-ridge complexes are known to generate highly complicated groundwater systems (Oki, 2005). Older alluvium deposits, created during periods of extensive erosion that carved deep valleys in the original volcanoes, are of hydrological importance due to their relatively low hydraulic conductivity, estimated to be in the range of 3.96 × 10 −3 m/day (0.013 ft/day) to 0.33 m/day (1.08 ft/day) (Wentworth, 1938). The low permeability is related to chemical alteration, weathering, and compaction (Oki, 2005;Wentworth, 1951).

show abstract