Geomorphic and tectonic evolution of the Ecuadorian Andes

Coltorti, Mauro; Ollier, C. D.

doi:10.1016/s0169-555x(99)00036-7

Cited by 97 publications

(78 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Epiphytism arose in both tillandsioids and the tank-epiphyte bromelioids at just about the times that the northern Andes and the Serra do Mar -two key areas occupied by these clades -began their major uplifts in the Middle and Late Miocene, respectively. Access to volcanically active Central America after the Isthmus of Panama narrowed by the Middle Miocene (Farris et al, 2011;Montes et al, 2012) as well as continued uplift of the Andes 3-5 Mya (Steinmann et al, 1999;Coltorti and Ollier, 2000;Gregory-Wodzicki, 2000) continued to provide a diversifying influence for tillandsioids. Uplift of the Serra do Mar during the Pliocene apparently triggered a radiation of epiphytic bromelioids there.…”

Section: Recent Invasion Of a New Adaptive Zone Key Innovations Andmentioning

confidence: 99%

Adaptive radiation, correlated and contingent evolution, and net species diversification in Bromeliaceae

Givnish

Barfuss

et al. 2014

Molecular Phylogenetics and Evolution

336

408

View full text Add to dashboard Cite

Section: Recent Invasion Of a New Adaptive Zone Key Innovations Andmentioning

confidence: 99%

Adaptive radiation, correlated and contingent evolution, and net species diversification in Bromeliaceae

Givnish

Barfuss

et al. 2014

Molecular Phylogenetics and Evolution

336

408

View full text Add to dashboard Cite

“…The basin of the Paute River is located in the inter-Andean depression separating the western and Cordillera Real in southern Ecuador (Coltorti and Ollier, 2000). With an area of 5066 km 2 and elevation range from 1840 to 4680 m a.s.l., the basin has a vital hydropower plant complex at its downstream end.…”

Section: Study Areamentioning

confidence: 99%

Climate changes of hydrometeorological and hydrological extremes in the Paute basin, Ecuadorean Andes

Mora

Campozano

Cisneros

et al. 2014

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Investigation was made on the climate change signal for hydrometeorological and hydrological variables along the Paute River basin, in the southern Ecuador Andes. An adjusted quantile perturbation approach was used for climate downscaling, and the impact of climate change on runoff was studied for two nested catchments within the basin. The analysis was done making use of long daily series of seven representative rainfall and temperature sites along the study area and considering climate change signals of global and regional climate models for IPCC SRES scenarios A1B, A2 and B1. The determination of runoff was carried out using a lumped conceptual rainfall-runoff model. The study found that the range of changes in temperature is homogeneous for almost the entire region with an average annual increase of approximately +2.0 • C. However, the warmest periods of the year show lower changes than the colder periods. For rainfall, downscaled results project increases in the mean annual rainfall depth and the extreme daily rainfall intensities along the basin for all sites and all scenarios. Higher changes in extreme rainfall intensities are for the wetter region. These lead to changes in catchment runoff flows, with increasing high peak flows and decreasing low peak flows. The changes in high peak flows are related to the changes in rainfall extremes, whereas the decreases in the low peak flows are due to the increase in temperature and potential evapotranspiration together with the reduction in the number of wet days.

show abstract

“…Two other catchments, Huagrahuma and Soroche, are located in the Machangara valley northwest of Cuenca. The geology of all catchments consists of Cretaceous and early Tertiary lavas and andesitic volcanoclastic deposits, shaped and compacted by glacier activity during the last ice age [Coltorti and Ollier, 2000;Hungerbühler et al, 2002]. The hydraulic conductivity of the bedrock is low, particularly compared to the hydraulic conductivity of the thin layer of volcanic ashes that constitute the soil layer [Buytaert et al, 2005].…”

Section: Experimental Catchmentsmentioning

confidence: 99%

Regionalization as a learning process

Buytaert

Beven

2009

Water Resources Research

View full text Add to dashboard Cite

[1] This paper deals with the uncertainty involved in geographical migration of hydrological model structures, commonly known as regionalization. Regionalization relies on the hypothesis that calibrated parameter sets from a donor catchment can be useful to predict discharge of an ungauged catchment. However, since every catchment is unique, model parameters need to be adapted for differences between a calibration and a prediction catchment, either by transformation or further selection. This process is inherently uncertain. Model parameters, and therefore the required changes, do not exactly represent quantities that we can measure or calculate. This paper outlines an approach to learn about how model parameters should be transformed between a gauged and an ungauged catchment. The approach consists of an iterative process, in which a model structure is applied successively to gauged catchments. After each step, parameter behavior is evaluated as a function of catchment properties and intercatchment similarities. The method is illustrated with an application of a customized version of TOPMODEL to a set of catchments in the Ecuadorian Andes. First, parameter sets are generated for a donor catchment. This model ensemble is then used to predict the discharge of the other catchments, after applying a stochastic parameter transformation to account for the uncertainty in the model migration. The parameter transformation is then evaluated and improved before further application. The case study shows that accurate predictions can be made for predicted basins. At the same time, knowledge is gained about model behavior and potential model limitations.

show abstract

Geomorphic and tectonic evolution of the Ecuadorian Andes

Cited by 97 publications

References 23 publications

Adaptive radiation, correlated and contingent evolution, and net species diversification in Bromeliaceae

Adaptive radiation, correlated and contingent evolution, and net species diversification in Bromeliaceae

Climate changes of hydrometeorological and hydrological extremes in the Paute basin, Ecuadorean Andes

Regionalization as a learning process

Contact Info

Product

Resources

About