Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...
This resource contains some files/folders that have non-preferred characters in their name. Show non-conforming files/folders.
This resource contains content types with files that need to be updated to match with metadata changes. Show content type files that need updating.
| Authors: |
|
|
|---|---|---|
| Owners: |
|
This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource. |
| Type: | Resource | |
| Storage: | The size of this resource is 16.5 MB | |
| Created: | Feb 16, 2026 at 8:21 p.m. (UTC) | |
| Last updated: | Feb 16, 2026 at 11:26 p.m. (UTC) | |
| Citation: | See how to cite this resource | |
| Content types: | CSV Content |
| Sharing Status: | Public |
|---|---|
| Views: | 25 |
| Downloads: | 0 |
| +1 Votes: | Be the first one to this. |
| Comments: | No comments (yet) |
Abstract
In Hawaiʻi, groundwater draining from wetter, high-recharge uplands provides virtually all drinking water and delivers freshwater nutrients (as well as contaminants) to ecosystems in the nearshore environment. Despite the importance of groundwater, its hidden nature makes it difficult to observe and quantify, which results in a poor understanding of its spatiotemporal dynamics from the uplands to the coast. We combine a storage-discharge approach with a long-term (7+ years) water balance to quantify the relationship between groundwater and stream discharge in 11 (USGS-gaged) watersheds across the Hawaiian Islands. We then use each watershed’s unique storage-discharge relationship to resolve daily estimates of catchment storage and the ‘groundwater leakage’ flux emanating from the watersheds. The resolved mean specific daily leakage is consistent with compiled measurements of submarine groundwater discharge (SGD) at the coast downstream of the 11 watersheds and reflected in the hydraulic connectivity between leakage and head response in a basal aquifer. Example groundwater leakage hydrographs from Hālawa (Oʻahu) and Waiākea (Hawaiʻi) watersheds resolve temporal dynamics of flow moving below the urban centers of Honolulu and Hilo, where contaminants enter aquifers, poison drinking water, and degrade coastal environments. By resolving groundwater leakage at a daily timestep, we reveal a previously hidden portion of the hydrologic cycle that can inform modeling of water resources and water quality in leaky watersheds in Hawai‘i and beyond.
Subject Keywords
Coverage
Spatial
Temporal
| Start Date: | |
|---|---|
| End Date: |
Content
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
Comments
There are currently no comments
New Comment