ABSTRACT Based on a future temperature increase of 0.5°C and precipitation decrease of 25%, the climate elasticity of streamflow to precipitation and temperature changes in 12 Andean watersheds of the Coquimbo Region, north-central Chile, was assessed. Also, the possible relationships between this elasticity and specific physiographic characteristics of the watersheds (area, average elevation, slope distribution, terrain roughness, slope orientation, vegetation cover) were studied. Climate elasticity of streamflow ranged between 0 and 2.8. Watersheds presenting higher elevations, with a fairly well-balanced distribution of slope exposure tend to exhibit lower elasticity, which could be explained by the contribution of snowfall to the hydrological regime, more significant in those watersheds. Results should be considered when downscaling climate model projections at the basin scale in mountain settings. Finally, uncertainties in the approach, given by factors such as streamflow seasonality, data availability and representativeness and watershed characteristics, and therefore the scope of the results, are discussed.

中文翻译：

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在气候变化的背景下，智利中北部干旱的安第斯流域的流量弹性

摘要 基于未来气温升高 0.5°C 和降水减少 25%，评估了智利中北部科金博地区 12 个安第斯流域的径流对降水和温度变化的气候弹性。此外，还研究了这种弹性与流域特定地貌特征（面积、平均海拔、坡度分布、地形粗糙度、坡度方向、植被覆盖度）之间的可能关系。流量的气候弹性介于 0 和 2.8 之间。海拔较高、坡度暴露分布相当均衡的流域往往表现出较低的弹性，这可以通过降雪对水文状况的贡献来解释，在这些流域中更为显着。在山区环境下在盆地尺度上缩小气候模型预测时应考虑结果。最后，讨论了该方法的不确定性，这些不确定性是由河流季节性、数据可用性和代表性以及流域特征等因素给出的，因此也讨论了结果的范围。