Dataset Information

High-resolution hydrometeorological data from a network of headwater catchments in the tropical Andes.

ABSTRACT: This article presents a hydrometeorological dataset from a network of paired instrumented catchments, obtained by participatory monitoring through a partnership of academic and non-governmental institutions. The network consists of 28 headwater catchments (<20?km²) covering three major biomes in 9 locations of the tropical Andes. The data consist of precipitation event records at 0.254?mm resolution or finer, water level and streamflow time series at 5?min intervals, data aggregations at hourly and daily scale, a set of hydrological indices derived from the daily time series, and catchment physiographic descriptors. The catchment network is designed to characterise the impacts of land-use and watershed interventions on the catchment hydrological response, with each catchment representing a typical land use and land cover practice within its location. As such, it aims to support evidence-based decision making on land management, in particular evaluating the effectiveness of catchment interventions, for which hydrometeorological data scarcity is a major bottleneck. The data will also be useful for broader research on Andean ecosystems, and their hydrology and meteorology.

SUBMITTER: Ochoa-Tocachi BF

PROVIDER: S-EPMC6029571 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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High-resolution hydrometeorological data from a network of headwater catchments in the tropical Andes.

Ochoa-Tocachi Boris F BF Buytaert Wouter W Antiporta Javier J Acosta Luis L Bardales Juan D JD Célleri Rolando R Crespo Patricio P Fuentes Paola P Gil-Ríos Junior J Guallpa Mario M Llerena Carlos C Olaya Dimas D Pardo Pablo P Rojas Gerver G Villacís Marcos M Villazón Mauricio M Viñas Paúl P De Bièvre Bert B

Scientific data 20180703

This article presents a hydrometeorological dataset from a network of paired instrumented catchments, obtained by participatory monitoring through a partnership of academic and non-governmental institutions. The network consists of 28 headwater catchments (<20 km<sup>2</sup>) covering three major biomes in 9 locations of the tropical Andes. The data consist of precipitation event records at 0.254 mm resolution or finer, water level and streamflow time series at 5 min intervals, data aggregations ...[more]

PMID: 29969116

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Project description:A global warming-induced transition from glacial to periglacial processes has been identified in mountainous regions around the world. Degrading permafrost in pristine periglacial environments can produce acid rock drainage (ARD) and cause severe ecological damage in areas underlain by sulfide-bearing bedrock. Limnological and paleolimnological approaches were used to assess and compare ARDs generated by rock glaciers, a typical landform of the mountain permafrost domain, and their effects on alpine headwater lakes with similar morphometric features and underlying bedrock geology, but characterized by different intensities of frost action in their catchments during the year. We argue that ARD and its effects on lakes are more severe in the alpine periglacial belt with mean annual air temperatures (MAAT) between -2°C and +3°C, where groundwater persists in the liquid phase for most of the year, in contrast to ARD in the periglacial belt where frost action dominates (MAAT < -2°C). The findings clearly suggest that the ambient air temperature is an important factor affecting the ARD production in alpine periglacial environments. Applying the paleoecological analysis of morphological abnormalities in chironomids through the past millennium, we tested and rejected the hypothesis that unfavorable conditions for aquatic life in the ARD-stressed lakes are largely related to the temperature increase over recent decades, responsible for the enhanced release of ARD contaminants. Our results indicate that the ARDs generated in the catchments are of a long-lasting nature and the frequency of chironomid morphological deformities was significantly higher during the Little Ice Age (LIA) than during pre- or post-LIA periods, suggesting that lower water temperatures may increase the adverse impacts of ARD on aquatic invertebrates. This highlights that temperature-mediated modulations of the metabolism and life cycle of aquatic organisms should be considered when reconstructing long-term trends in the ecotoxicological state of lakes.

Dataset Information

High-resolution hydrometeorological data from a network of headwater catchments in the tropical Andes.

Publications

High-resolution hydrometeorological data from a network of headwater catchments in the tropical Andes.

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