Journal of Hydrology-Regional Studies最新文献

{"title":"Sensitivity of montane grassland water fluxes to warming and elevated CO2 from local to catchment scale: A case study from the Austrian Alps","authors":"","doi":"10.1016/j.ejrh.2024.101970","DOIUrl":"10.1016/j.ejrh.2024.101970","url":null,"abstract":"<div><p>Study region: Montane grassland within the Gulling catchment, Austrian Alps. Study focus: A climate-change experiment in a grassland ecosystem used lysimeters and HYDRUS-1D models to quantify changes in evapotranspiration (ET) and groundwater recharge (GWR) due to warming (＋3 °C) and elevated <span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> concentrations (<span><math><mrow><mi>Δ</mi><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>; ＋300 ppm). Findings at the plot-scale were generalized and transferred to the surrounding catchment, half comprised of grassland, using three lumped rainfall–runoff models and two spatially-distributed Community Water Models, differing in soil hydraulic properties.</p><p>New hydrological insights for the region: Warming increased ET and decreased GWR and river discharge compared to ambient conditions. <span><math><mrow><mi>Δ</mi><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> increased stomatal resistance, which partially offset warming effects. In scenarios combining warming and <span><math><mrow><mi>Δ</mi><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>, the impact of warming was higher than <span><math><mrow><mi>Δ</mi><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> effect. Elevation influenced the sensitivity of ET to warming, which was greater at the catchment scale than at the plot scale, while GWR was more sensitive to warming at the plot scale. Under dry conditions, GWR and discharge exhibited increased sensitivity to warming at both scales. HYDRUS-1D successfully reproduced lysimeter experiment results and their sensitivity to warming and <span><math><mrow><mi>Δ</mi><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>. Despite model agreement on water flux sensitivity to climate changes, the varying response magnitudes highlight the need for a multi-model approach in climate impact assessments. This study provides insights into how climate change might impact hydrological dynamics of montane grassland systems across the Central European Alps.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003197/pdfft?md5=aa5fabc922873653387e16e2c07981b8&pid=1-s2.0-S2214581824003197-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial and temporal analysis and trends of extreme precipitation over the Mississippi River Basin, USA during 1988–2017","authors":"","doi":"10.1016/j.ejrh.2024.101954","DOIUrl":"10.1016/j.ejrh.2024.101954","url":null,"abstract":"<div><h3>Study region</h3><p>Mississippi River Basin.</p></div><div><h3>Study focus</h3><p>Using daily precipitation records of 769 meteorological stations over the Mississippi River Basin (MRB), the spatial-temporal variability and trend of nine extreme precipitation indices were estimated and statistically assessed using the Mann-Kendall test. Factors likely to influence the spatial pattern and trends of precipitation extremes indices were also checked.</p></div><div><h3>New hydrological insights for the region</h3><p>The spatial pattern of the extreme precipitation indices exhibits a southeast to Northwest dipole, with the maximum values recorded over the southeastern part of the domain (exception being for Consecutive Dry Days, CDD which shows otherwise) driven by the southerly moisture transport toward the southeast. The spatial pattern of the extreme precipitation is controlled by the topography. The results also show that, on average, almost all the indices (except CDD) exhibit an increasing trend. The total wet day precipitation exhibits a significant increasing trend. Spatially, most of the significant increasing (decreasing) trends of the extreme's precipitation-except CDD- are located over the Upper (South) MRB where there is a significant sign toward cooling (warming) conditions. This supports the view that changing climate towards warming (cooling) conditions is significantly affecting precipitations extremes over the MRB. The relationships between large-scale teleconnections and extreme precipitation show that Pacific North America significantly increases (decreases) frequency and intensity indices over the Northwest (southeast) MRB, whereas the Pacific Decadal Oscillation does increase the frequency and intensity indices over the southeast. El Niño Southern Oscillation significantly increases the frequency and intensity indices over the entire MRB, with consequences to infrastructure failures, increasing vulnerable populations, risk zones and relocations populations.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003033/pdfft?md5=93deadfd3ee51f863b1e7e7fca183256&pid=1-s2.0-S2214581824003033-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of submarine groundwater discharge on the nutrient dynamics of a fringing-reef lagoon","authors":"","doi":"10.1016/j.ejrh.2024.101956","DOIUrl":"10.1016/j.ejrh.2024.101956","url":null,"abstract":"<div><h3>Study region</h3><p>This study investigates nutrient distribution and flux dynamics in a coral reef lagoon in Quintana Roo, Mexico, located on a permeable limestone coast of the Mesoamerican Barrier Reef System.</p></div><div><h3>Study Focus</h3><p>Emphasis is placed on submarine groundwater discharge (SGD) as a crucial contributor to nutrient pathways, including ammonium (NH₄⁺), nitrate and nitrite (NO_x^-), hydrogen silicate (HSiO₃^-), hydrogen phosphate (HPO₄^2-), and urea. Inputs vary with SGD magnitudes and sources and by proximity to active spring discharges. Groundwater multi-tracer analysis and multiple linear regression identify ²²⁶Ra as explaining NH₄⁺ variability due to long-term groundwater processes, while ²²³Ra predicts NO_x^-, HSiO₃^-, and urea due to short-term inputs. No significant relationship was found between HPO₄^2- and any radium isotope, indicating complex behavior in coastal karst aquifers.</p></div><div><h3>New hydrological insights for the region</h3><p>The findings highlight complex nutrient dynamics in coastal karst settings, with SGD-derived fluxes primarily consisting of dissolved inorganic nitrogen (DIN) and HSiO₃^-. Although lower in concentration, HPO₄^2- and urea fluxes are significant compared to other karst environments. Radium isotopes distinguish between short-term and long-term, as well as new and recycled nutrient inputs. Groundwater inputs transport fresh nutrients to healthier reefs, whereas processed, recycled inputs were detected near degraded reefs. These insights are essential for understanding global nutrient cycles and coral health, particularly in the context of global change and anthropogenic disturbances affecting coral reef ecosystems.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003057/pdfft?md5=0bea6e8ae64e3b7154ecb14a62c77702&pid=1-s2.0-S2214581824003057-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combining the digital filtering method with the SWAT model to simulate spatiotemporal variations of baseflow in a mountainous river basin","authors":"","doi":"10.1016/j.ejrh.2024.101972","DOIUrl":"10.1016/j.ejrh.2024.101972","url":null,"abstract":"<div><h3>Study region</h3><p>Ganjiang River Basin, a typical mountainous river basin which located on the south bank of the middle-lower Yangtze River. The Ganjiang River is the seventh largest tributary of the Yangtze River.</p></div><div><h3>Study focus</h3><p>Baseflow, a key recharge source for the river streamflow. This study combined the digital filtering method with the SWAT model to examine the temporal and spatial patterns of baseflow across the Ganjiang River Basin, and quantitatively assessed land use change impact on baseflow.</p></div><div><h3>New hydrological insights for the region</h3><p>Baseflow in the Ganjiang River Basin shows a \"single peak\" intra-annual distribution. Monthly variations of streamflow and baseflow across the basin are different. The variation of baseflow index is generally opposite to that of streamflow. A positive correlation has been noted between the annual baseflow and streamflow, while a negative correlation was found between the annual baseflow index and precipitation. Due to the potential influence of basin topography, river flow direction and rock layer distribution, baseflow and baseflow modulus showed a spatially increasing trend from south to north, with the northwest region having extremely strong groundwater recharge. In comparison to the basic scenario, under extreme land use scenarios of forest, grassland, and cropland, baseflow may experience an increase of 14.7 % and 2.9 %, while witness a decrease of 13.9 %. All results improve the understanding of baseflow spatiotemporal variations in river basins.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003215/pdfft?md5=af61a1108888ad8b477f1967f8f33768&pid=1-s2.0-S2214581824003215-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Attributing climate variability, land use change, and other human activities to the variations of the runoff-sediment processes in the Upper Huaihe River Basin, China","authors":"","doi":"10.1016/j.ejrh.2024.101955","DOIUrl":"10.1016/j.ejrh.2024.101955","url":null,"abstract":"<div><h3>Study regions</h3><p>The Wangjiaba (WJB) watershed, located in the upper Huaihe River Basin in China.</p></div><div><h3>Study focus</h3><p>An attributing framework has been proposed combining the Double Mass Curve (DMC) and the Soil and Water Assessment Tools (SWAT) model to identify the contributions of climate variability, Land use (LU) change, and Other Human Activities (OHA) to the variations in runoff-sediment processes within the WJB.</p></div><div><h3>New hydrological insights for the region</h3><p>The studied period was able to be separated into three sub-periods (<span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>: 1981–1991, <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>: 1992–2009, and <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>: 2010–2019) using the DMC, and the SWAT model could simulate runoff and Sediment Yields Load (SYL) properly during different sub-periods after calibration. Generally, the runoff, SYL, and Suspended Sediment Concentration (SSC) within the WJB exhibited a decrease trend with a change rate of −1.3 mm a⁻¹, −8.49×10⁴ t a⁻¹, and −0.01 kg m⁻³ a⁻¹, respectively. Substantially, climate variability decreases runoff, SYL, and SSC from <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span> to <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>; LU change decreases runoff, SYL, and SSC from <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> to <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>; OHA decreases SYL and SSC from <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span> to <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span>, but increases SYL and SSC from <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> to <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>. It should be noticed that the OHA has increased the SYL significantly especially over the downstream of WJB from <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> to <span><math><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>. It is essential to enhance soil erosion prevention measures in the future under the background of global climate change.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003045/pdfft?md5=8163ab38bb95d3cb9f7869ed824e4874&pid=1-s2.0-S2214581824003045-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Runoff variation and its attribution analysis in the typical basin of Loess Plateau at multiple temporal and spatial scales","authors":"","doi":"10.1016/j.ejrh.2024.101963","DOIUrl":"10.1016/j.ejrh.2024.101963","url":null,"abstract":"<div><h3>Study region</h3><p>Dali River Basin, a typical basin on the Loess Plateau (LP) in China</p></div><div><h3>Study focus</h3><p>The LP has undergone extensive ecological management in recent decades, significantly altering runoff in the region. For more scientific management of basins, it is useful to study runoff variations at multiple scales quantitatively. Dali River Basin (DRB) was used as the model basin. The impacts of climate change (CC) and human activity (HA) were quantitatively analyzed based on the features of runoff changes at multiple scales using observed hydrological data from to 1960–2020. The characteristics of potential factors influencing HA were further analyzed.</p></div><div><h3>New hydrological insight for the region</h3><p>The study showed that basin runoff was mainly concentrated during May-October. Spatially, most of the runoff originated from the middle and lower reaches, with little change in the upper reaches. Both CC and HA affected runoff variation, but their effects shifted from upstream to downstream. Apart from the upper reaches, HA was dominant in summer and autumn, whereas CC was dominant in spring and winter. Changes in runoff might be caused by temporal and spatial differences in HA, such as converting cultivated land into forests and grasslands, increasing NDVI, and constructing dams. This analysis of runoff variations at multiple temporal and spatial scales in a representative basin provides a reliable reference for the ecological management of the LP.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003124/pdfft?md5=a4607a704d1643b0a7e662e83e875c72&pid=1-s2.0-S2214581824003124-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of soil water, temperature, and salt and their coupled effects in Haloxylon ammodendron forests of different ages in an arid desert oasis ecotone","authors":"","doi":"10.1016/j.ejrh.2024.101965","DOIUrl":"10.1016/j.ejrh.2024.101965","url":null,"abstract":"<div><h3>Study region</h3><p>The study region is a typical desert oasis ecotone of the Hexi Corridor, Northwest China.</p></div><div><h3>Study focus</h3><p>Based on four years of in situ observational data of soil water, temperature, and electrical conductivity obtained from three <em>Haloxylon ammodendron (H. ammodendron)</em> forests (20, 30 and 50 years) in a typical desert oasis ecotone (DOE) of the Hexi Corridor, in this study, the mechanisms of change and coupled effects of water, heat, and salt in frozen desert soils along a long-term shrub plantation in a typical desert oasis ecotone are presented.</p></div><div><h3>New hydrological insights for the region</h3><p>This study revealed that changes in soil water, heat, and salt and their coupling effects were completely different between shallow (0–80 cm) and deep (160–200 cm) depths. At 0–80 cm, soil water gradually decreased in the 50-year-old <em>H. ammodendron</em> plot, but soil salt first increased in the 30-year plot and then decreased in the 50-year plot. When the freezing process occurred in the 0–80 cm depth interval, the soil water and salt contents decreased nonlinearly with the absolute value of the soil temperature (|<em>T</em>|), following a power function and logarithmic function, respectively. For the thawing process in the 0–80 cm depth interval, soil water and salt increased with increasing temperature, and there was a significant linear relationship between soil water and salt (<em>P</em>&lt;0.01). In the 160–200 cm layer, soil water and salt significantly increased after 30–50 years during the growing season.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003148/pdfft?md5=13106a26764e72bf3bc50b0c3a471bcd&pid=1-s2.0-S2214581824003148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Runoff concentration decline for Tarim river due to a dramatic increasing of runoff in cold season and hydro-junction regulation: Past and future","authors":"","doi":"10.1016/j.ejrh.2024.101962","DOIUrl":"10.1016/j.ejrh.2024.101962","url":null,"abstract":"<div><h3>Study region</h3><p>The three headwaters of Tarim river, south of the Xinjiang Province, China.</p></div><div><h3>Study focus</h3><p>Temporal runoff concentration variations are crucial for water resources utilization and management, particularly in arid regions. In this study, the runoff concentration in the Tarim River Basin is studied based on analysis of the trend, abrupt changes, and periodicity, identifying key extreme climate indices influencing the Gini-runoff coefficient and predicting its future changes under three Shared Socioeconomic Pathways (SSPs).</p></div><div><h3>New hydrological insights for the region</h3><p>From 1962–2020, the Gini-runoff coefficient decreased by 8.3 %, while annual runoff increased by 14.2 %. This is attributed to temperature changes, escalating hydrological risk uncertainty. The anomaly of low geopotential high fields and Central Asian anticyclones have caused an increase in total cloud cover (TCC) and precipitation, and a decrease in the Daily Temperature Range (DTR). Increasing of Warm nights (TN90), Maximum Tmax (TXx), and Hot nights (TR) have enhanced the warm-season runoff. However, the climatic impact on warm-season runoff is less pronounced than that in the cold season, which led to the runoff concentration decline. Changes in hydro-junction regulation led to decrease of Gini-runoff coefficient by 12.11 % from 2001 to 2020 along the Hotan river. Under the three SSP scenarios, the average Gini-runoff coefficient for the Aksu and Hotan rivers are expected to decrease by 3.3 % and 2.6 %, respectively.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003112/pdfft?md5=6d8bd2b386b8d66bdf3473e18608a1a4&pid=1-s2.0-S2214581824003112-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing sources of nutrients in small watersheds with different land-use patterns using TN, TP, and NO3--N","authors":"","doi":"10.1016/j.ejrh.2024.101958","DOIUrl":"10.1016/j.ejrh.2024.101958","url":null,"abstract":"<div><h3>Study region</h3><p>The Seohwa watershed, South Korea.</p></div><div><h3>Study focus</h3><p>Agricultural practices and urbanization in watersheds increase nutrient loads (total nitrogen (TN), total phosphorus (TP), and nitrate-nitrogen (NO₃^--N)) in streams and deteriorate water quality. Between October 2017 and October 2018, water samples were collected from a small stream (MS), main tributary (TS), and sub-tributaries (ST) characterized by different land-use patterns. The objective of this study was to identify the sources that determine water quality in the respective streams and to estimate whether water quality was dependent on land-use patterns.</p></div><div><h3>New hydrological insights for the region</h3><p>TN in MS progressively decreased downstream, whereas such spatial variation was not observed in TS and ST. For TP, TS and ST samples showed elevated concentrations during storm events, but not in MS. These observations resulted from TN and TP derived from natural and anthropogenic sources associated with land-use patterns. Interestingly, TN/TP ratios were strongly negatively correlated with the proportion of residential area (R² = 0.92) rather than other land-use patterns such as agricultural area and forest. In addition, statistical analysis and dual isotopes of nitrate (NO₃^-) showed that the water quality in MS and the one in TS and ST were predominantly affected by natural sources and anthropogenic sources, respectively. Considering the effects of land-use patterns and rainfall on water quality, anthropogenic sources should be precisely identified to manage stream water in small watersheds more effectively.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003070/pdfft?md5=f7a6671eb6c0d69ae3ba335502bb0ada&pid=1-s2.0-S2214581824003070-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated operation of sand dam and groundwater dam to increase water supply capacity in mountainous areas of Chuncheon, South Korea","authors":"","doi":"10.1016/j.ejrh.2024.101959","DOIUrl":"10.1016/j.ejrh.2024.101959","url":null,"abstract":"<div><h3>Study region</h3><p>A valley area in South Korea</p></div><div><h3>Study focus</h3><p>Sand dams are cost-effective water-storage facilities for water-stressed areas in arid and semi-arid climates, with the advantages of reducing evaporation losses and filtering pollutants. Generally, sand dams are constructed by placing a horizontal barrier across the river bed, creating a naturally sand-filled structure upstream. Unlike this typical construction, a sand dam in Korea in the monsoon climate region was built near a mountainous valley, not in a stream, in Mulori, Chuncheon City, to ensure a sustainable water supply throughout the year, and especially to prevent freezing in the winter. Furthermore, a small-scale groundwater dam was additionally constructed downstream of the sand dam to increase the water supply capacity in preparation for severe droughts. In this study, the hydrological reservoir-routing simulations were performed to evaluate the effects of the combined use of the two dams on increasing water supply.</p></div><div><h3>New hydrological insights for the region</h3><p>Daily discharge rates for the period from March 16, 2020 to July 6, 2022 were simulated for several hybrid operations that supplies water primarily through the sand dam under the normal conditions, but combines both water sources to manage severe droughts. The simulated results showed that, compared with operating the sand dam alone, the hybrid operations could satisfy the village’s water demand by increasing the minimum water supply rates by 24.6–50.0 m³/day for different simulation conditions. The combined use of sand and groundwater dams presented in this study will help provide sustainable water supply in water-stressed areas, especially mountainous uplands vulnerable to droughts and freezes.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003082/pdfft?md5=0ebb60ee991559c4e257ef492009f335&pid=1-s2.0-S2214581824003082-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}