An important challenge associated with climate change is the increase in intensities of extreme precipitation events, which produce severe flooding and cause substantial damage to hydraulic infrastructure. This intensification has been particularly evident recent decades attributable increased daily temporal concentration rainfall over shorter durations. results pulses and, consequently, higher intensities. In Chile, National Water Agency (DGA) published standardized duration coefficients...

The Huasco river basin, located in the arid north of Chile (28-30° S), is particularly important due to ecosystem services that provides Valley. To contribute conservation their aquatic ecosystems and associated services, a Secondary Environmental Quality Standard (Norma Secundaria de Calidad Ambiental, NSCA) was recently established protect surface waters basin.In addition intense incremental demand for water resources, primarily by agriculture, climate change significant decrease...

Abstract. Hydrological drought is one of the main hydroclimatic hazards worldwide, affecting water availability, ecosystems, and socioeconomic activities. This phenomenon commonly characterized by Standardized Streamflow Index (SSI), which widely used because its straightforward formulation calculation. Nevertheless, there limited understanding what SSI actually reveals about how climate anomalies propagate through terrestrial cycle. To find possible explanations, we implemented Structure...

Data scarcity has traditionally precluded the application of advanced hydrologic techniques in developing countries. In this paper, we evaluate performance a flood forecasting scheme sparsely monitored catchment based on distributed modeling, discharge assimilation, and numerical weather predictions with explicit validation uncertainty analysis. For component our framework, apply TopNet to Cautin River basin, located southern Chile, using fully priori parameterization both...

ABSTRACTWe examine the extent to which parameters of different types catchments are sensitive calibration criteria selection (i.e. parameter agreement), and explore possible connections with overall model performance complexity. To this end, we calibrate lumped GR4J, GR5J GR6J hydrological models – coupled CemaNeige snow module in 95 spanning a myriad hydroclimatic physiographic characteristics across Chile, using 12 streamflow-oriented objective functions. The results show that (i) choice...

Rapa Nui Island, is the most isolated inhabited place in world and a popular tourist destination, like other island communities located Pacific Ocean. This unique system, which lacks rivers or permanent surface watercourses, particularly vulnerable to climatic variations that could affect groundwater recharge, their main source of freshwater. The increase water consumption, along with predictions less precipitation higher temperatures due climate change, underscores need better understand...

Over the past decades, extreme events like floods and droughts have become more frequent intense, future climate change scenarios may worsen this condition. Hence, we examine projected changes in drought characteristics under SSP5-8.5 scenario Cautín river basin, located Araucanía region, Chile. To end, calibrated 20 model structures created with FUSE hydrological modeling platform, using historical daily data available from 1979 to 2014. Runoff projections were generated...

Chile is one of the most vulnerable countries to impacts climate change. This suggests challenges mitigate their and adapt existing infrastructure. Despite a consensus that future change will lead an increase in hydrometeorological extremes importance including this factor hydrological design hydraulic infrastructure, clear national guidelines on how achieve implement practice are still lacking. To address gap, study aims align methodologies with international best practices by offering...

Megadroughts are multi-year precipitation deficits that cause severe hydrological, ecological, agricultural or socioeconomic droughts, and they increasing world-wide in duration, severity extension. The Chilean Megadrought is among the most severe, persistent extensive droughts on record South America (from 2010 to present), offers an ideal study case understand importance of glaciers during periods water stress. Here, we simulate response Central Andes Chile Argentina both ongoing...

Abstract. Spatially distributed hydrology and land surface models are typically applied in combination with river routing schemes that convert instantaneous runoff into streamflow. Nevertheless, the development of such has been somehow disconnected from hydrologic model calibration research, although both seek to achieve more realistic streamflow simulations. In this paper, we bridge gap understand extent which configuration affects parameter searches water resources applications. To end,...

Abstract The Andes Cordillera remains a sparsely monitored and studied snow hydrology environment in comparison to similar mountain ranges the Northern Hemisphere. In order uncover some of key processes driving water equivalent (SWE) spatial variability, we present analyze distributed SWE data set, sampled at end accumulation season 2011. Three representative catchments across region were monitored, obtaining measurements an elevation range spanning 2000 3900 m asl from 32.4° 34.0°S...

Abstract The impact of urbanization on groundwater is not simple to understand, as it depends a variety factors such climate, hydrogeology, water management practices, and infrastructure. In semiarid landscapes, the processes can involve high consumptions irrigation increases, which in turn may contribute recharge. We assessed hydrological impacts rates an Andean peri‐urban catchment located Chile, climate. For this purpose, we built validated coupled surface–groundwater model that allows...

Abstract The assessment of climate change impacts on water resources and flood risk is typically underpinned by hydrological models calibrated selected based observed streamflow records. Yet, changes in are rarely accounted for when selecting models, which compromises their ability to robustly represent future catchment hydrology. In this paper, we test a simple framework an ensemble model structures catchments where contrasting climatic conditions have been observed. We start considering 78...

In many developing countries, hydropower represents a significant contribution to the electricity generation matrix. Chile, combination of run-of-the-river and reservoir systems contributes approximately 50% total electric input, plans for further development are under way, in order match projections 100% demand increase next 20 years. Clearly, production is very sensitive short- long-term climatic variability. With river showing annual streamflow coefficients variation greater than 0.5,...

With regards to the impacts of climate change on water resources, snowmelt dominated basins have been recognized as one most vulnerable regions throughout world. The main reasons are that these prone be affected by both temperature and precipitation changes. Metropolitan Region in Chile is located basins, Maipo basin. This holds more than 40% population country a comparable number terms contribution country's Gross Domestic Product (GDP). Projections future conditions present dire for this...

Understanding the availability and distribution of water resources is crucial for efficient management. Chilean basins in northern central regions typically exhibit characteristics a snow or mixed regime, with snowmelt runoff being primary source supply. Industries such as mining, agriculture hydroelectric power generation experience peak demand during period. Determining average monthly this period essential effective planning. Currently, both public private institutions perform forecasts...

Abstract Characterizing climate change impacts on water resources typically relies Global Climate Model (GCM) outputs that are bias‐corrected using observational data sets. In this process, two pivotal decisions (a) the Bias Correction Method (BCM) and (b) how to handle historically observed time series, which can be used as a continuous whole (i.e., without dividing it into sub‐periods), or partitioned monthly, seasonal (e.g., 3 months), any other temporal stratification (TS). Here, we...

Se analiza la ocurrencia de corrientes detritos en una cuenca andina que no se dispone información fluviométrica y desarrolla los primeros contrafuertes Cordillera Los Andes, zona cercana a ciudad Santiago, Chile. estiman caudales líquidos asociados mayores eventos históricos acuerdo literatura pueden clasificarse como flujos barro o forma tradicional determinación diseño cuencas pluvionivales. Dada incidencia estos tienen sobre población zonas aledañas al cauce, evalúa crecida máxima...