Journal of Hydrology-Regional Studies最新文献_第8页

GRACE observes the natural and irrigation-induced regional redistribution of water storage in Central Asia GRACE 观测中亚蓄水的自然和灌溉引起的区域再分布情况

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-07 DOI: 10.1016/j.ejrh.2024.101994

Abror Gafurov , Valeria Selyuzhenok , Milena Latinovic , Heiko Apel , Adkham Mamaraimov , Abdulkhakim Salokhiddinov , Eva Boergens , Andreas Güntner

Study Region

Central Asia region, where snow and glacier covered Tian Shan and Pamir mountains serve as “Water Tower” to supply populated areas downstream with essential freshwater resources, predominantly for agricultural production in summer and for energy production in winter.

Study Focus

To identify the impact of irrigation practices on large-scale water storage by analyzing the spatial dynamics of water storage in Central Asia from sink to source using satellite-based Terrestrial Water Storage (TWS) variations from six GRACE(-FO) solutions and snow cover from MODIS.

New Hydrological Insights for the Region

Snow Cover Index (SCI), a new proxy index for snow accumulation shows that GRACE-based TWS dynamics agree very well with snow accumulation and melt for seasonal and inter-annual variations. The spatial patterns of seasonal TWS variations show water re-distribution from the mountain region to the downstream parts, where agricultural fields are irrigated. In these areas, the maximum storage in summer observed with the majority of GRACE solutions can be attributed to the diversion of water inflow from the mountain ranges into vast areas of agricultural land. The ability of GRACE to observe both natural and human-induced water re-distribution in Central Asia indicates its potential for regional-scale monitoring applications in water resources management.

研究地区中亚地区，被积雪和冰川覆盖的天山和帕米尔山脉是 "水塔"，为下游人口稠密地区提供必要的淡水资源，主要用于夏季农业生产和冬季能源生产。研究重点利用六种 GRACE（-FO）解决方案中基于卫星的陆地蓄水量（TWS）变化和 MODIS 的积雪覆盖率，分析中亚地区从汇水区到水源区的蓄水空间动态，从而确定灌溉方法对大规模蓄水的影响。季节性 TWS 变化的空间模式表明，水从山区重新分布到下游农田灌溉地区。在这些地区，大多数 GRACE 解决方案观测到的夏季最大蓄水量可归因于将山脉流入的水分流到大片农田。全球资源共享行动能够观测中亚地区自然和人为造成的水重新分布情况，这表明它在水资源管理的区域级监测应用方面具有潜力。

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引用次数: 0

Spatio-temporal characteristics of heavy precipitation events observed over the last decade on the eastern French Mediterranean coastal area 过去十年在法国地中海东部沿海地区观测到的强降水事件的时空特征

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-03 DOI: 10.1016/j.ejrh.2024.101988

Sarah Vigoureux , Pierre Brigode , Maria-Helena Ramos , Julie Poggio , Raphaëlle Dreyfus , Emmanuel Moreau , Christophe Laroche , Emmanuel Tric

Study region

eastern part of the French Mediterranean coastal area.

Study focus

This work focuses on the heavy precipitation events that have affected the eastern part of the French Mediterranean coastal area over the last decade and the river discharges associated with these events. The aim is to make a throughout analysis of the spatio-temporal characteristics of heavy precipitation events, and to evaluate whether a high flow event is associated with them when looking at river discharges on affected catchments.

New hydrological insights for the region

Based on radar-based precipitation grids, 158 heavy precipitation events (HPEs) affected the study area over the period 2007–2020. In addition, 65 % of HPEs were associated with a high flow event (HFE) on one or more gauged catchments. Results show that HPEs were more frequent during the beginning of summer and autumn. A large portion of autumn and winter HPEs were associated with a HFE. Looking at the spatio-temporal characteristics of the HPEs, their mean duration was 20 hours, with 42 % of the events lasting less than 6 hours. Some common characteristics among the HPEs that caused HFEs were identified: all HPEs lasting more than 30 hours and all HPEs with catchment precipitation accumulation above 150 mm were associated with a HFE.

研究区域法国地中海沿岸地区东部。研究重点这项工作的重点是过去十年中影响法国地中海沿岸地区东部的强降水事件以及与这些事件相关的河流排水量。其目的是对强降水事件的时空特征进行全面分析，并在研究受影响流域的河流排水量时，评估强降水事件是否与大流量事件有关。对该地区的新水文见解根据雷达降水网格，在 2007-2020 年期间，共有 158 次强降水事件 (HPE) 影响了研究区域。此外，65% 的 HPE 与一个或多个测量集水区的大流量事件 (HFE) 相关联。结果表明，夏初和秋季发生 HPE 的频率较高。大部分秋季和冬季 HPE 与大流量事件有关。从 HPE 的时空特征来看，其平均持续时间为 20 小时，其中 42% 的事件持续时间少于 6 小时。在导致 HFE 的 HPEs 中发现了一些共同特征：所有持续时间超过 30 小时的 HPEs 和所有集水区降水累积量超过 150 毫米的 HPEs 都与 HFE 有关。

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引用次数: 0

Detection of flood trends and drivers in the Taihu Basin, China 中国太湖流域洪水趋势和驱动因素探测

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-03 DOI: 10.1016/j.ejrh.2024.101990

Yu Xu , Yulu Zhang , Kaixin Liu , Yanjuan Wu , Chao Gao

Study region

Taihu Basin, China

Study focus

Floods threaten humans, the environment, economic activity, and infrastructure. In this study, a new trend test and flood-frequency methods were adopted to detect extreme floods and their distributions based on flood-event identification. To fully understand the phased process of the influence of human activities on extreme hydrological processes, 12 copula functions were employed creatively in combined static and dynamic time-varying correlation aspects between extreme precipitation and floods.

New hydrological insights for the region

Although both significant and insignificant increasing trends of the annual maximum water level in all three hydrological districts were examined, the periodic oscillations of all the stations were similar. Thus, it was significant to fully detect the periodical variation of floods. Extreme floods occurred mainly in the 1990s, as measured by frequency estimates. Generally, the nonstationary response relationship between heavy rain and an extreme water level was gradually strengthened; that is, a certain magnitude precipitation seemed to induce a greater-intensity flood event as time passed. Through the identification of historical flood events and the analysis of the rise and fall processes of floods, we found that the main reason for variation in the response relationship was the increase in the water level before the rising stage, rather than the water level rising in the Taihu Basin. Our study findings further existing knowledge on the regional flood-control design standard and can ensure the coexistence of humans and water systems in the future.

研究地区中国太湖流域研究重点洪水威胁着人类、环境、经济活动和基础设施。本研究在洪水事件识别的基础上，采用新的趋势检验和洪水频率方法来探测极端洪水及其分布。为全面了解人类活动对极端水文过程的阶段性影响过程，在极端降水与洪水之间的静态和动态时变相关性方面，创造性地使用了 12 个 copula 函数。因此，全面检测洪水的周期性变化意义重大。根据频率估算，特大洪水主要发生在 20 世纪 90 年代。一般来说，暴雨与特大水位之间的非平稳响应关系逐渐加强，即随着时间的推移，一定的降水量似乎会诱发更大强度的洪水事件。通过对历史洪水事件的识别和洪水涨落过程的分析，我们发现响应关系变化的主要原因是涨水前水位的上升，而不是太湖流域水位的上升。我们的研究结果进一步丰富了现有的区域防洪设计标准知识，可确保未来人类与水系的共存。

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引用次数: 0

150-year daily data (1870–2021) in lakes and rivers reveals intensifying surface water warming and heatwaves in the Pannonian Ecoregion (Hungary) 湖泊和河流 150 年的每日数据（1870-2021 年）显示潘诺尼亚生态区（匈牙利）地表水变暖和热浪加剧

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-02 DOI: 10.1016/j.ejrh.2024.101985

Huan Li , Jiang Sun , Quan Zhou , Mariusz Sojka , Mariusz Ptak , Yi Luo , Sirui Wu , Senlin Zhu , Viktor R. Tóth

Study region

Pannonian Ecoregion, Hungary.

Study focus

Bridging the gap between atmospheric influences and aquatic environments, this study embarked on a comprehensive reconstruction of daily surface water temperatures across lakes and rivers within the Pannonian Ecoregion over an extensive period of 150 years (1870–2021).

New hydrological insights for the region

The analysis revealed a clear warming trend in waters over the past 150 years, and majority of this warming occurred in recent three to four decades (average warming rate: 0.317 °C/decade). Seasonal patterns indicated that winter and spring exhibited faster warming rates, followed by autumn and summer. There has been a significant increase in the number, duration, and intensity of heatwaves in both lakes and rivers, particularly pronounced in the last 30–40 years, and with the rise of air temperatures, river and lake heatwaves tend to intensity. These findings underscore the escalating impact of climate change on freshwater systems in the Pannonian Ecoregion, emphasizing the urgent need for mitigation measures. As the first study on river and lake heatwaves in Hungary and one of the few studies on river heatwaves worldwide, this study will provide reference for analysing extreme thermal events in aquatic systems.

研究重点为了缩小大气影响和水生环境之间的差距，本研究开始全面重建潘诺尼亚生态区域内湖泊和河流在 150 年（1870-2021 年）内的每日地表水温度。分析显示，在过去的 150 年中，水域有明显的变暖趋势，其中大部分变暖发生在最近的三四十年间（平均变暖速度：0.317 °C/十年）。季节模式表明，冬季和春季的变暖速度较快，其次是秋季和夏季。湖泊和河流热浪的次数、持续时间和强度都显著增加，在过去 30-40 年间尤为明显。这些发现凸显了气候变化对潘诺尼亚生态区淡水系统的影响日益加剧，强调迫切需要采取缓解措施。作为匈牙利第一项关于河流和湖泊热浪的研究，也是全球为数不多的关于河流热浪的研究之一，这项研究将为分析水生系统中的极端热事件提供参考。

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引用次数: 0

Assessing drought conditions in Northeast Brazil: A comparative analysis of soil moisture, groundwater, and total water storage 评估巴西东北部的干旱状况：土壤水分、地下水和总蓄水量的比较分析

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-02 DOI: 10.1016/j.ejrh.2024.101983

Mayara Silva de Oliveira , Alfredo Ribeiro Neto , Luiz Antonio Candido , Peyman Saemian

Study region

Northeast Brazil (NEB).

Study focus

Over the past few decades, there has been a noticeable surge in the applications of drought indices centered around Total Water Storage (TWS) and its components. This study aims to evaluate the dynamics of continental water storage and its components in Northeast Brazil (NEB), utilizing drought indices based on soil moisture (SMI), groundwater (GWI) and TWS (WSDI) for the period 2003–2022. Four types of data were employed: remote sensing (ESA CCI SM and GRACE), in-situ data (SM and GW storage), land surface model simulations, and global Standardized Precipitation Evapotranspiration Index (SPEI). The first two served as the reference for comparison with the SM, GW, and TWS simulated by the Catchment Land Surface Model (CLSM).

New hydrological insights for the region: Drought indices based on CLSM data from the Global Land Data Assimilation System (GLDAS) can be considered reliable after comparison with SPEI and analysis of their patterns using continuous wavelet transformation (CWT). The SMI is more correlated with the SPEI-3 (3-month time scale), and the GWI presented better correlations with the time scales between 12 and 36 months of the SPEI. Changes in the trend of the indices were detected in the hydrographic regions localized in the south of the study area, indicating an increase in drought occurrence. The calculation of the TWS (doing the sum of SM and GW from the CLSM) fitted well with the GRACE data.

研究地区巴西东北部（NEB）.研究重点过去几十年来，以总蓄水量（TWS）及其组成部分为中心的干旱指数的应用明显激增。本研究旨在利用 2003-2022 年期间基于土壤水分（SMI）、地下水（GWI）和总蓄水量（WSDI）的干旱指数，评估巴西东北部（NEB）大陆蓄水量及其组成部分的动态变化。采用了四种类型的数据：遥感（欧空局 CCI SM 和 GRACE）、原位数据（SMI 和 GW 储存）、地表模型模拟和全球标准化降水蒸散指数 (SPEI)。前两者作为参考，与集水区地表模型（CLSM）模拟的 SM、GW 和 TWS 进行比较：基于全球陆地数据同化系统（GLDAS）CLSM 数据的干旱指数在与 SPEI 进行比较并使用连续小波变换（CWT）对其模式进行分析后，可以认为是可靠的。SMI 与 SPEI-3（3 个月时间尺度）的相关性更高，而 GWI 与 SPEI 的 12 至 36 个月时间尺度的相关性更好。在研究区南部的局部水文区域，发现了指数趋势的变化，表明干旱发生率有所上升。第三世界降水量指数的计算（通过 CLSM 计算 SM 和 GW 之和）与 GRACE 数据非常吻合。

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引用次数: 0

Assessment of climate change effect on environmental flows for macroinvertebrates using an integrated hydrological-hydraulic-habitat modelling 利用水文-水力-生境综合模型评估气候变化对大型无脊椎动物环境流量的影响

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-02 DOI: 10.1016/j.ejrh.2024.101982

Somsubhra Chattopadhyay , Ewelina Szałkiewicz , Paweł Marcinkowski , Dorota Mirosław-Świątek , Mikołaj Piniewski

Study region

A short reach of the Jeziorka river and its upstream catchment in central Poland

Study focus

Climate change is expected to have significant impacts on freshwater ecosystems, particularly on temperate region streams resulting often in changes to spatiotemporal distribution of macroinvertebrate species, as well as losses in richness and aquatic biodiversity due to the loss of suitable habitat. This study aimed to evaluate the impact of climate change on the habitat suitability and environmental flow violations for the filter feeder functional group of macroinvertebrate communities in a temperate lowland river in central Poland. To achieve this, we have successfully integrated hydrological (SWAT+), hydraulic (HEC-RAS 1D and SRH-2D), and habitat (CASiMiR) models. We have forced the model cascade with GCM/RCM projections to determine changes in future habitat conditions for a selected reach of the Jeziorka river.

New hydrological insights for the region

Future habitat conditions may deteriorate, as reflected in overwhelmingly negative trends in the hydraulic habitat suitability (HHS) index. According to the projections, there will be fewer days with the necessary environmental flows for filter feeders in the future. The frequency and duration of environmental flow violations, caused by too low or too high flows, depend on the climate model scenarios and timeframes. Our findings will aid water resource planners in achieving sustainable water resource management and meeting environmental flow requirements in the face of a changing climate.

研究区域波兰中部 Jeziorka 河的一小段河道及其上游集水区研究重点气候变化预计将对淡水生态系统产生重大影响，尤其是对温带地区的河流，这通常会导致大型无脊椎动物物种时空分布的变化，以及由于适宜栖息地的丧失而导致的丰富度和水生生物多样性的损失。本研究旨在评估气候变化对波兰中部一条温带低地河流中大型无脊椎动物群落滤食者功能组的栖息地适宜性和环境流量侵害的影响。为此，我们成功整合了水文（SWAT+）、水力（HEC-RAS 1D 和 SRH-2D）和生境（CASiMiR）模型。我们利用 GCM/RCM 预测对模型级联进行了强制，以确定杰济奥尔卡河选定河段未来栖息地条件的变化。对该地区水文情况的新见解未来的栖息地条件可能会恶化，这反映在水力栖息地适宜性 (HHS) 指数中压倒性的负面趋势上。根据预测，未来滤食动物所需环境流量的天数将会减少。由于流量过低或过高而造成的环境流量违规的频率和持续时间取决于气候模型情景和时间框架。我们的研究结果将有助于水资源规划者实现可持续的水资源管理，并在不断变化的气候条件下满足环境流量要求。

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引用次数: 0

Analysis of short- and long-term controls on the variability of event-based runoff coefficient 对基于事件的径流系数变异性的短期和长期控制分析

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-02 DOI: 10.1016/j.ejrh.2024.101993

Tianle Xu , Pin-Ching Li , Venkatesh Merwade

Study region

This study focuses on the Ohio Region, which spans 11 states in the eastern United States.

Study focus

Runoff coefficients are crucial in hydrology, indicating the relationship between rainfall and runoff. Understanding their controls and variability is essential for water resource assessment, management strategies, and land use planning. This research examines factors influencing runoff coefficients and their trends in the Ohio region using data from the North American Land Data Assimilation System phase-2 (NLDAS-2) Mosaic Land Surface Model, covering 2000–2020. The analysis considers short-term controls, such as climatic features (rainfall intensity, amount, and duration), hydrological factors (antecedent soil moisture, drainage density, and curve number), topographic factors (drainage area, land use, slope, elevation), and watershed shape. Additionally, the study investigates trends in runoff coefficients and their long-term controls, including climatic factors and land use changes.

New hydrological insights for the region

The findings indicate that runoff coefficients increase with antecedent soil moisture and rainfall intensity. Higher elevations show lower runoff coefficients due to forested land use. Larger watersheds have lower runoff coefficients at low rainfall intensity but higher ones when intensity is high. Long-term trends reveal soil moisture as the primary control, with land cover changes as a secondary factor. This research deepens understanding of runoff coefficient dynamics and controls in the Ohio region. Future studies could explore the impacts of urbanization, reservoirs, evapotranspiration, and snowmelt on runoff coefficients.

研究重点径流系数在水文学中至关重要，它表明了降雨与径流之间的关系。了解径流系数的控制和变化对水资源评估、管理策略和土地利用规划至关重要。本研究利用北美陆地数据同化系统第二阶段（NLDAS-2）马赛克地表模型中 2000-2020 年的数据，研究了俄亥俄地区径流系数的影响因素及其变化趋势。分析考虑了短期控制因素，如气候特征（降雨强度、降雨量和持续时间）、水文因素（先期土壤湿度、排水密度和曲线数）、地形因素（排水面积、土地利用、坡度、海拔）和流域形状。此外，该研究还调查了径流系数的变化趋势及其长期控制因素，包括气候因素和土地利用变化。海拔越高，径流系数越低，这是由于使用了林地。较大的流域在降雨强度较低时径流系数较低，但在降雨强度较高时径流系数较高。长期趋势表明，土壤湿度是主要的控制因素，而土地覆盖的变化是次要因素。这项研究加深了人们对俄亥俄地区径流系数动态和控制的理解。未来的研究可以探讨城市化、水库、蒸散和融雪对径流系数的影响。

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引用次数: 0

Combined interpretation of geophysical, hydrogeochemical and environmental isotope data in a distal lobe of the Maros fluvial fan, Hungary – A novel approach in aquifer characterisation 匈牙利马罗什河流冲积扇远端叶地球物理、水文地球化学和环境同位素数据的综合解释--含水层特征描述的新方法

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-01 DOI: 10.1016/j.ejrh.2024.101978

Teodóra Szőcs , Ágnes Rotár Szalkai , Levente Magyar , László Palcsu , Márton Bujdosó , János Stickel , Zoltán Püspöki

Study region

Pannonian Basin, Hungary, Maros fluvial fan.

Study focus

This paper presents a novel approach to characterise a distal lobe of a fluvial fan, demonstrating how a combined interpretation of high-resolution geophysical methods like electrical resistivity tomography and geophysical cone penetration tests together with log-correlation, hydrogeochemical, isotope and noble gas data provides a sound basis for aquifer characterisation. This multidisciplinary investigative approach is applicable to any fluvial fan to support water management.

New hydrological insights for the region

(1) The studied fluvial fan forms a hydraulically interconnected aquifer system, with three channel belts and six hydrostratigraphic units. (2) Mean groundwater residence times are distinct in the aquifers studied. Holocene infiltration, with apparent residence time younger than 20–22 years is characteristic in the uppermost channel belt and forms part of local groundwater flow systems. The deeper aquifers host groundwater infiltrated during the Pleistocene, as part of the intermediate flow system. (3) Where the silty-clayey floodplain sediments have been replaced by sandy deposits, and groundwater abstraction is present, groundwater can communicate between the upper and lower channel belts, therefore fresh infiltration passes into the deeper channel belts, resulting mostly in mean residence times younger than 100 years. However, Pleistocene infiltration was detected at about 30 m below surface in the second channel belt, where the unconfined aquifer is missing and silty-clayey sediments are on the surface.

研究区域匈牙利潘诺尼亚盆地，马罗河流扇。研究重点本文介绍了一种描述河漫滩远端叶片特征的新方法，展示了如何将高分辨率地球物理方法（如电阻率层析成像法和地球物理锥入度测试）与测井相关性、水文地球化学、同位素和惰性气体数据相结合，为含水层特征描述奠定坚实基础。这种多学科调查方法适用于任何河漫滩，可为水资源管理提供支持。对该地区的新水文见解 (1) 所研究的河漫滩形成了一个水力互联的含水层系统，有三个河道带和六个水文地层单元。(2）在所研究的含水层中，地下水的平均停留时间各不相同。最上层河道带以全新世渗透为特征，表观停留时间小于 20-22 年，是当地地下水流系统的一部分。较深的含水层中的地下水是在更新世期间渗入的，是中间水流系统的一部分。(3) 在淤泥质粘土洪泛区沉积物已被砂质沉积物所取代，且存在地下水抽取的地方，地下水可以在上下河道带之间进行交流，因此，新渗透的地下水会进入较深的河道带，导致平均停留时间大多小于 100 年。不过，在第二河道带地表以下约 30 米处检测到了更新世时期的渗透，该处无承压含水层消失，地表为淤泥质粘土沉积物。

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引用次数: 0

Identification of hotspots and cold-spots of groundwater potential using spatial statistics 利用空间统计识别地下水潜力的热点和冷点

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-09-30 DOI: 10.1016/j.ejrh.2024.101977

Tao Liu , Imran Ahmad , Mithas Ahmad Dar , Martina Zelenakova , Lema Misgan Gebrie , Teshome Kifle , Gashaw Sintayehu Angualie

Study region

The Guna-Tana landscape is located in Ethiopia. This landscape is seriously facing water scarcity problems, that’s why we studied this landscape and provided the hotspots of groundwater potential areas in this region.

Study focus

In this study the hotspots and cold-spots of groundwater potential at, 99, 95, and 90 % confidence levels has been deciphered. Using Gi-Bin values, four classes has been identified viz., 2–3 (highly favorable), 0–1 (fairly favorable), −2 to −1 (poorly favorable) and −3 (very poorly favorable). The hotspots was subjected to ordinary least squared (OLS) regression to understand the impact of chosen parameters (viz., geology, land-use, soil, rainfall, slope, and distance to rivers) towards groundwater potential.

New hydrological insights for the region

The absence of redundancy among the selected parameters was indicated by the VIF values of the parameters, which were determined to be less than 7.5. It was discovered that the Robust Probability (Robust_Pr) was statistically significant (p < 0.01). The OLS model appears to have captured the variability of exploratory variables, as evidenced by the decreased values of Akaike's Information Criterion (AICc). The Adjusted R-squared value of 0.9119 indicates that exploratory variables has successfully explained 91.19 % of the variance of the model.

研究区域古纳-塔纳地貌位于埃塞俄比亚。该地貌正面临着严重的缺水问题，因此我们对该地貌进行了研究，并提供了该地区地下水潜力的热点区域。研究重点本研究破译了置信度分别为 99%、95% 和 90% 的地下水潜力热点和冷点。利用 Gi-Bin 值确定了四个等级，即 2-3（非常有利）、0-1（相当有利）、-2 至-1（不利）和-3（非常不利）。对热点地区进行了普通最小二乘法（OLS）回归，以了解所选参数（即地质、土地利用、土壤、降雨量、坡度和与河流的距离）对地下水潜力的影响。研究发现，稳健概率 (Robust_Pr) 在统计学上具有显著意义（p < 0.01）。从阿凯克信息准则（AICc）值的下降可以看出，OLS 模型似乎捕捉到了探索变量的变异性。调整 R 平方值为 0.9119，表明探索变量成功解释了模型中 91.19 % 的变异。

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引用次数: 0

Effects of a bypass-type multistage sand-filled dam on water supply in a drought-vulnerable area in Mullocheon catchment, South Korea 旁路式多级填沙坝对韩国 Mullocheon 流域干旱易发区供水的影响

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-09-28 DOI: 10.1016/j.ejrh.2024.101997

Il Hwan Kim , Sun Woo Chang , Min-Gyu Kim , Il-Moon Chung

Study region

Mullocheon catchment, Gangwon-do, South Korea

Study focus

Climate change can lead to extreme droughts worldwide, and regions relying on valley streams without large reservoirs are more vulnerable to drought. To address this, a bypass-type multistage sand-filled dam (BMSD) was constructed in a drought-prone area in South Korea, specifically in the Mullocheon catchment, to supply water to a small-population village. The BMSD was connected in series with an existing small pond, and the drainage rates were integrated through a single conduit. Quantitatively analyzing the contribution of the newly constructed sand-filled dam was challenging, so this study investigated the effect of the sand dam on water supply capacity using a bed-mounted infiltration system. The contribution of the sand-filled dam to the total drainage rate was calculated using observation data.

New hydrological insights for the region

The hydraulic conductivity of the riverbed and the drainage rate of the intake pond were estimated using the observed water level and flow rate. Prior to the installation of the sand dam, from January to May 2021, the total precipitation was approximately 284.72 mm, and the average drainage rate was 76.78 m³/d. After the sand dam was installed, from January to May 2022, the precipitation was 165.13 mm, and the average drainage rate increased by 45.4 % to 124.49 m³/d. It was observed that during normal periods, the supply was more than three times greater than before, and even during droughts, the supply met the residents' needs. This indicates that the sand-filled dam’s storage effect has enhanced drought resilience.

研究地区韩国江原道木鱼川集水区研究重点气候变化会导致全球范围内的极端干旱，而依靠河谷溪流而没有大型水库的地区更容易受到干旱的影响。为了解决这个问题，我们在韩国的干旱多发地区，特别是在木洛川集水区修建了一座旁路式多级堆沙坝（BMSD），为一个人口稀少的村庄供水。该水坝与一个现有的小池塘串联在一起，并通过一条管道整合排水率。定量分析新建砂坝的贡献具有挑战性，因此本研究使用床式渗透系统调查了砂坝对供水能力的影响。利用观测数据计算了填沙坝对总排水量的贡献。对该地区水文的新认识利用观测水位和流量估算了河床的导水性和取水池的排水量。沙坝安装前，2021 年 1 月至 5 月的总降水量约为 284.72 毫米，平均排水量为 76.78 立方米/天。沙坝安装后，2022 年 1 月至 5 月的降水量为 165.13 毫米，平均排水量增加了 45.4%，达到 124.49 立方米/天。据观察，在正常时期，供水量是以前的三倍多，即使在干旱时期，供水量也能满足居民的需求。这表明，砂坝的蓄水效果增强了抗旱能力。

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