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San Carlos_Costa Rica database for HYP-20-0127


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Resource type: Composite Resource
Storage: The size of this resource is 389.1 KB
Created: Apr 05, 2020 at 10:51 p.m.
Last updated: Apr 05, 2020 at 11:03 p.m.
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Sharing Status: Public
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Abstract

Headwaters are generally assumed to contribute the majority of water to downstream users, but how much water, of what quality and where it is generated are rarely known in the humid tropics. In this study, using monthly monitoring in the data scarce (2370 km2) San Carlos catchment in northeastern Costa Rica, we determined runoff-area relationships and related those to geochemical and isotope tracers. We established 46 monitoring sites covering the full range of climatic, land use and geological gradients in the catchment. Regression and cluster analysis revealed unique spatial patterns and hydrologically functional landscape units. These units were used for Bayesian mixing models to assess spatial water source contributions to the outlet. Generally, the chemical and isotopic imprint at the outlet is dominated by the adjacent lowland catchments (68 %) with much less influence from the headwaters. In contrast, flow volumes seemed to be linearly scaled by area, which was only true in terms of tracers for the physically more homogeneous headwater catchments. The headwater catchments contributed the bulk of water and tracers to the outlet during the dry season (>50 %) despite covering less than half of the total catchment area. Stable isotopes indicated mean recharge elevations above the mean catchment altitude, which provide further support that headwaters were the primary source of downstream water. Our spatially detailed “snap-shot” sampling enabled a viable alternative source of large-scale hydrological process knowledge in the humid tropics with limited data availability.

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
San Carlos river catchment
North Latitude
11.0907°
East Longitude
-84.0438°
South Latitude
10.2594°
West Longitude
-84.9776°

Temporal

Start Date:
End Date:

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
University of Costa Rica Advanced Studies UCREA B8276
IAEA CRP22009
IAEA CRP22760

How to Cite

Birkel, C. (2020). San Carlos_Costa Rica database for HYP-20-0127, HydroShare, http://www.hydroshare.org/resource/e6b38a2999354626a36058676f916a47

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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