Journal of Hydrology-Regional Studies最新文献_第5页

Groundwater-surface water exchanges in an alluvial plain in southern France subjected to pumping: A coupled multitracer and modeling approach 受抽水影响的法国南部冲积平原的地下水-地表水交换：多示踪剂和建模耦合方法

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-22 DOI: 10.1016/j.ejrh.2024.101995

Jérôme Texier , Julio Gonçalvès , Thomas Stieglitz , Christine Vallet-Coulomb , Jérôme Labille , Vincent Marc , Angélique Poulain , Philippe Dussouillez

Study region

The study was conducted in an alluvial plain between the Rhône and the Ouvèze Rivers (in the southeast of France) extensively exploited for drinking water. The research area is characterized by significant groundwater-surface interactions influenced by groundwater pumping activities.

Study focus

The aim of this study is to enhance the understanding of interactions between rivers and alluvial aquifers by combined multi-tracer and numerical modeling approaches. Over an 18-month period, groundwater temperature, piezometric levels, and river surface water levels were continuously monitored. Field campaigns focused on conductivity, stable isotopes of water, and radon-222 activity concentration in both groundwater and surface water. Radon-222 was used to quantify water exchanges between the river and the aquifer. A MODFLOW model, calibrated using piezometric data and PEST, was employed to simulate groundwater flow and reactive transport of radon-222 using MT3DMS.

New hydrological insights for the region

The study reveals that river water recharges the aquifer, with radon-222 data delineating this recharge zone. The methodology extended the interpretation of periodic groundwater temperature signals to isotopic signals, allowing the identification of dispersivity and Darcy's velocity. The Ouvèze River was found to contribute approximately 55 % of the pumping water supply, alongside the Rhône. These findings provide valuable insights for sustainable water resource management, demonstrating the relevance of using natural tracers in scenarios where artificial tracers are impractical.

研究区域该研究在罗讷河和乌韦兹河（位于法国东南部）之间的冲积平原进行，该平原被广泛开发用于饮用水。研究重点这项研究旨在通过多示踪剂和数值建模相结合的方法，加深对河流和冲积含水层之间相互作用的了解。在为期 18 个月的时间里，对地下水温度、压水位和河流地表水位进行了连续监测。实地活动的重点是地下水和地表水中的电导率、水的稳定同位素以及氡-222 活性浓度。氡-222 被用来量化河流与含水层之间的水交换。该研究揭示了河水对含水层的补给作用，氡-222 数据则划定了这一补给区。该方法将周期性地下水温度信号的解释扩展到同位素信号，从而确定了分散性和达西速度。研究发现，乌韦兹河与罗纳河的水量约占抽水水量的 55%。这些发现为水资源的可持续管理提供了宝贵的见解，证明了在人工示踪剂不可行的情况下使用自然示踪剂的相关性。

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引用次数: 0

Identification of dominant drivers of streamflow spatiotemporal variations in typical mountainous areas in the Hexi Corridor, China 确定中国河西走廊典型山区河水时空变化的主要驱动因素

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-22 DOI: 10.1016/j.ejrh.2024.102024

Lemin Wei , Wenzhi Zhao , Chuandong Wu , Xiangyan Feng , Dacheng Song

Study region

Typical mountain areas in the Hexi Corridor, China.

Study focus

Water security and ecosystem sustainability of arid inland river basins are highly dependent on upstream streamflow. However, due to the complex geographical environment and limited observation data in the study region, the attribution of spatiotemporal variations in streamflow influenced by climate change and/or human activities remains unclear. Here, we used partial least squares regression (PLSR) and the Budyko framework to unravel the dominant drivers of spatiotemporal variation in streamflow over the past 30 yr.

New hydrological insight for the region

Precipitation, topographic wetness index, slope, forest land, gross primary productivity, hydrological connectivity, soil organic carbon content, silt content, relative relief, NDVI and gravel content dominated spatial variation in streamflow. Temporal variation of streamflow was sensitive to precipitation and land surface. Specifically, increased precipitation and land surface alteration dominated the increase in streamflow in 50 % of the watersheds and the decrease in streamflow in 33 % of them, respectively. Further, land surface alteration was dominated by expansion of agricultural and built-up areas, weakened hydrological connectivity, increased landscape aggregation and forest cover. Controlling agricultural and built-up areas and the scale of afforestation, and focusing on the dynamics of hydrological connectivity and landscape patterns in the upstream reaches are imperative to maintain the security and sustainability of water resources in the arid inland river basins.

研究区域中国河西走廊的典型山区。研究重点干旱内陆河流域的水安全和生态系统可持续性高度依赖于上游河水流量。然而，由于研究区域复杂的地理环境和有限的观测数据，受气候变化和/或人类活动影响的径流量时空变化的归因仍不明确。降水、地形湿润指数、坡度、林地、总初级生产力、水文连通性、土壤有机碳含量、粉砂含量、相对地形、NDVI 和砾石含量主导了溪流的空间变化。溪流的时间变化对降水和地表很敏感。具体而言，降水增加和地表改变分别主导了 50% 流域的溪流增加和 33% 流域的溪流减少。此外，农业区和建筑区的扩大、水文连通性的减弱、景观聚集度的增加和森林覆盖率的提高也是地表变化的主要原因。要保持干旱内陆河流域水资源的安全性和可持续性，就必须控制农业区和建筑区以及植树造林的规模，并关注上游水文连通性和景观格局的动态变化。

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引用次数: 0

Spatiotemporal desynchronization in the propagation from meteorological to soil moisture drought in the Loess Plateau, China 中国黄土高原从气象干旱到土壤水分干旱传播过程中的时空不同步现象

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-22 DOI: 10.1016/j.ejrh.2024.102025

Mingqiu Nie , Shengzhi Huang , Xin-Min Zeng , Jian Peng , Ganggang Bai

Study Region

The Loess Plateau (LP) of China

Study Focus

Meteorological drought (MD) would propagate to soil moisture drought (SMD) with spatiotemporal desynchronization. The spatial desynchronization between them has frequently been ignored in previous studies due to limitation of identified droughts, which did not consider their 3-dimensional (3D, i.e. longitude, latitude and time) properties. This study presents a 3D perspective on the spatiotemporal desynchronization in the propagation from meteorological to soil moisture drought in the the Loess Plateau (LP) of China, using an improved drought matching method. Event Synchronization (ES) is extended to determine temporal linkage of the two types of droughts and spatial connection is tested using overlapping area.

New Hydrological Insights for the Region

The results showed that: (1) the improved method is reasonable for identifying MDs that trigger SMDs, down to specific clusters; (2) 8 SMDs preceded MDs 1 month, while approximately 79 % of SMDs did not recover after the determination of MDs; (3) severity of MD is an impact factor on recovery lag, while antecedent soil moisture dominates onset lag with the relative importance of approximately 50 %; and (4) incompletely overlap in migration trajectory between the two types of droughts was mainly caused by temperature, followed by antecedent soil moisture and potential evapotranspiration, with relative importance of 55 %, 14 % and 12 %, respectively.

研究区域中国黄土高原（LP）研究重点气象干旱（MD）会随着时空不同步传播到土壤水分干旱（SMD）。在以往的研究中，由于识别干旱的局限性，没有考虑它们的三维（3D，即经度、纬度和时间）特性，它们之间的空间非同步性经常被忽视。本研究采用改进的干旱匹配方法，从三维角度探讨了中国黄土高原（LP）从气象干旱到土壤水分干旱传播过程中的时空非同步性。结果表明：(1) 改进的方法是合理的；(2) 改进的方法是有效的；(3) 改进的方法是可行的；(4) 改进的方法是可行的；(5) 改进的方法是可行的：结果表明：(1) 改进后的方法可以合理地识别出引发 SMD 的多级干旱，甚至是特定的群集；(2) 8 个 SMD 比多级干旱早发生 1 个月，而约 79% 的 SMD 在确定多级干旱后没有恢复；(3) 多级干旱的严重程度是恢复滞后的影响因素，而先期土壤水分主导了起始滞后，相对重要性约为 50%；(4) 两种干旱的迁移轨迹不完全重合主要是由温度造成的，其次是先决土壤水分和潜在蒸散量，相对重要性分别为 55%、14% 和 12%。

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引用次数: 0

Utilizing the HBV-Light semi-distributed conceptual hydrological model to estimate groundwater recharge in the upstream part of the Awash River basin, Ethiopia 利用 HBV-Light 半分布式概念水文模型估算埃塞俄比亚阿瓦什河流域上游的地下水补给量

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-21 DOI: 10.1016/j.ejrh.2024.102018

A. Muauz , B. Berehanu , H. Bedru

Study region

Upstream part of the Awash River basin, located central part of Ethiopia

Study focus

In this paper, we estimated the groundwater recharge using a semi-distributed, conceptual hydrological HBV-Light model. We used metrological and flow data from the Ethiopia Metrological Agency and the Ministry of Water and Energy, respectively. To simulate groundwater recharge over the reference period from 1988 to 2015 we merged these data with the conceptual HBV-Light rainfall-runoff model for calibration and validation. The average yearly precipitation from 1986 to 2015 was 1117 mm. Two calibration situations are examined to determine the level of uncertainty using a Monte Carlo approach with randomly generated parameter values.

New hydrological insights for the region

For a 20-year calibration period, several parameter values were observed and modeled flow equally well. Except for most parameters, good simulations were discovered with values that varied across vast ranges. A few parameters were well-defined (i.e., the optimum parameter values were within limited ranges). We also employed the regional sensitivity analysis (RSA) method to assess the sensitivity of model parameters and model. HBV-light and the generalized likelihood uncertainty estimation method were used for selecting its parameters. The results indicate that the calculated evapotranspiration is 79.5–80 % of the precipitation. Awash Melkakuntiro and Hombele’s calculated recharge rates are 220.8 mm/yr and 212.01 mm/yr, respectively. Thus, the average annual recharge for the study area is 216 (19.6 %) of the yearly precipitation. The study found that groundwater resource availability is strongly linked to current recharge rates. To improve the accuracy of groundwater recharge estimation, the HBV-Light model was employed. The study recommends enhancing data consistency and quality by expanding the hydrometeorological database and integrating real-time data for daily recharge calculations.

研究区域位于埃塞俄比亚中部的阿瓦什河流域上游地区研究重点在本文中，我们使用半分布式概念水文 HBV-Light 模型估算了地下水补给量。我们使用的计量和流量数据分别来自埃塞俄比亚计量局和水利能源部。为了模拟 1988 年至 2015 年参考期内的地下水补给情况，我们将这些数据与 HBV-Light 概念降雨-径流模型进行了合并，以进行校准和验证。1986 年至 2015 年的年平均降水量为 1117 毫米。在 20 年的校准期内，多个参数值的观测结果与模型流量相当。除了大多数参数外，其他参数的模拟结果都很好，参数值的变化范围很大。少数参数定义明确（即最佳参数值在有限范围内）。我们还采用了区域敏感性分析（RSA）方法来评估模型参数和模型的敏感性。模型参数的选择采用了 HBV-light 和广义似然不确定性估计方法。结果表明，计算得出的蒸散量占降水量的 79.5-80%。Awash Melkakuntiro 和 Hombele 的计算补给率分别为 220.8 毫米/年和 212.01 毫米/年。因此，研究区域的年平均补给量为全年降水量的 216（19.6%）。研究发现，地下水资源的可用性与当前的补给率密切相关。为提高地下水补给估算的准确性，采用了 HBV-Light 模型。研究建议通过扩大水文气象数据库和整合每日补给计算的实时数据来提高数据的一致性和质量。

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引用次数: 0

Quantifying propagation effects of climate and vegetation changes on evapotranspiration and streamflow signatures in Yarlung Tsangpo River Basin 量化气候和植被变化对雅鲁藏布江流域蒸散量和溪流特征的传播效应

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-21 DOI: 10.1016/j.ejrh.2024.102015

Qi Huang , Yongqiang Zhang , Congcong Li , Ning Ma

Study region

Yarlung Tsangpo River basin (YTRB) went through significant increases in precipitation, temperature and leaf area index (LAI) during 1982–2018.

Study focus

This study aims to investigate the propagation effects of climate and vegetation change on actual evapotranspiration (AET) and streamflow signatures with simulation experiments using an improved hydrological model that couples a diagnostic evapotranspiration module.

New hydrological insights

The improved hydrological model performs well in simulating streamflow, actual evapotranspiration and most streamflow signatures in six subcatchments of upper Nuxia region of YTRB (e.g. median Nash-Sutcliffe Efficiency of daily streamflow larger than 0.72). Changes in AET and streamflow are dominated by the long-term increase in precipitation (P), followed by considerable influence from the increase in LAI and marginal influence from the increase in temperature. Increases in both P and LAI have increased AET but caused wetting and drying effects on streamflow, respectively. LAI-induced increase in transpiration and interception evaporation is partly offset by the decrease in soil evaporation, resulting in marginal changes in AET. Subsequently, changes in streamflow signatures are amplified when propagating from AET to streamflow signatures, especially for those reflecting frequency and duration. This study advanced the understanding of the propagation effect of climate and vegetation variables on AET and streamflow signatures.

研究区域雅鲁藏布江流域（YTRB）在 1982-2018 年间经历了降水、温度和叶面积指数（LAI）的显著增加。研究重点本研究旨在通过使用改进的水文模型（该模型结合了蒸散诊断模块）进行模拟实验，研究气候和植被变化对实际蒸散（AET）和溪流特征的传播效应。新的水文见解改进后的水文模型在模拟 YTRB 上努夏地区六个子流域的溪流、实际蒸散量和大多数溪流特征方面表现良好（例如，日溪流的纳什-苏特克利夫效率中值大于 0.72）。AET 和溪流的变化主要受降水量（P）长期增加的影响，其次是 LAI 增加的显著影响和温度增加的微弱影响。降水量和 LAI 的增加都增加了 AET，但分别对溪流造成了湿润和干燥影响。LAI 引起的蒸腾和截流蒸发量的增加部分被土壤蒸发量的减少所抵消，从而导致 AET 的微小变化。随后，当从 AET 传播到流场特征时，流场特征的变化会被放大，尤其是那些反映频率和持续时间的特征。这项研究加深了人们对气候和植被变量对 AET 和溪流特征的传播效应的理解。

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引用次数: 0

Spatiotemporal patterns of pH related to streamflow variability, drought conditions, and bedrock lithology in acid sensitive streams within a humid, subtropical catchment: Mulberry River, Arkansas, USA 亚热带湿润集水区酸敏感溪流中 pH 值与溪流变化、干旱条件和基岩岩性的时空模式：美国阿肯色州桑树河

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-19 DOI: 10.1016/j.ejrh.2024.101992

Joshua M. Blackstock , Phillip R. Owens , Philip A. Moore , Max C.A. Torbenson , Amanda R. Ashworth , Kelsey R. Anderson , Jason Burgess-Conforti , Chris D. Delhom

Study region

Mulberry River, Arkansas, USA

Study focus

Low alkalinity streams within siliciclastic dominated catchments like the Mulberry River in the south-central United States experience episodic acidification. Since 2009, reaches of the Mulberry River have been classified as impaired due to low pH. We hypothesize that if pH time series patterns are similar among tributaries, external watershed factors like seasonal weather may be related to low stream pH. We investigated pH variability in the Mulberry River watershed including changepoint detection analysis. Patterns of pH and changepoints were compared with streamflow variability and drought conditions using Palmer Drought Severity Index (PDSI).

New hydrological insights for the region

Changes in pH were near synchronous and similar magnitude across the study area, despite observed increases in median tributary pH from east to west. From the comparison of pH time series and PDSI, low pH values tended to occur during more negative PDSI, i.e. drier periods. The specific mechanisms driving low pH variability remain elusive, but we infer low stream pH is influenced, in part, by seasonal weather variability leading to drier watershed conditions and lower pH. The spatial variability of median pH values from east to west, though, are more related to spatial variability in bedrock lithology. We hypothesize other acid-sensitive streams in the region likely share similar pH behavior and with low pH occurring during drier periods.

研究地区美国阿肯色州桑树河研究重点美国中南部桑树河等硅质岩为主的集水区内的低碱度河流会出现偶发性酸化。自 2009 年以来，桑树河的一些河段因 pH 值过低而被列为受损河段。我们假设，如果各支流的 pH 值时间序列模式相似，则流域外部因素（如季节性天气）可能与溪流 pH 值偏低有关。我们对桑树河流域的 pH 值变化进行了调查，包括变化点检测分析。尽管观察到中位支流 pH 值从东到西有所上升，但整个研究区域的 pH 值变化接近同步，且变化幅度相似。通过比较 pH 值时间序列和 PDSI，低 pH 值往往出现在 PDSI 为负值的时期，即较干旱的时期。驱动低 pH 值变化的具体机制仍然难以捉摸，但我们推断溪流低 pH 值部分是受季节性天气变化的影响，导致流域条件更干燥，pH 值更低。不过，pH 中值从东到西的空间变化与基岩岩性的空间变化关系更大。我们推测，该地区其他对酸度敏感的溪流可能也有类似的 pH 值变化，并且在较干旱时期会出现低 pH 值。

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引用次数: 0

Assessing the influences of future water development projects in Tekeze-Atbara-Setit basin on the Nile River inflow at Aswan, Egypt 评估 Tekeze-Atbara-Setit 流域未来水利开发项目对埃及阿斯旺尼罗河流入量的影响

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-19 DOI: 10.1016/j.ejrh.2024.102007

Ahmed M. Hafez, Mohammed Haggag, Ahmad Wagdy, Hany G. Radwan

Study region

The Tekeze-Atbara-Setit (TAS) basin as a portion of the Eastern Nile Basin (ENB) in Africa.

Study focus

ENB consists of four sub-basins; one of them is the Tekeze-Atbara-Setit basin. TAS basin is subject to future water development projects, including irrigation projects and hydropower dams. Potential impacts of these projects need to be assessed regarding the inflow and hydroelectric generation at Egypt's High Aswan Dam (HAD).

New hydrological insights for the region

Two models are coupled offline; The Soil Water Assessment Tool (SWAT) model and HEC-Reservoir Simulation Model (HEC-ResSim). Base-case scenario is created without the expected future projects, in addition to five additional scenarios representing hydropower and irrigation projects. The maximum annual inflow at HAD declines by 1.6 km³ in the hydropower scenarios, while the produced power at HAD descends by 9.5 %. The maximum reduction in the annual inflow for hydropower and irrigation projects scenario at HAD is 4.63 km³ and 35.2 % for power reduction. Finally, the proposed future development project in TAS basin will have negative impacts on the flow, and generated hydropower at HAD in Egypt.

研究区域特克泽-阿特巴拉-塞蒂特流域（TAS）是非洲东尼罗河流域（ENB）的一部分。研究重点ENB 由四个子流域组成，特克泽-阿特巴拉-塞蒂特流域是其中之一。特克泽-阿特巴拉-塞蒂特流域未来将开展水利开发项目，包括灌溉项目和水电大坝。需要评估这些项目对埃及阿斯旺高坝 (HAD) 的流入量和水力发电量的潜在影响。对该地区的新水文见解离线耦合了两个模型：土壤水评估工具 (SWAT) 模型和 HEC 水库模拟模型 (HEC-ResSim)。除了代表水力发电和灌溉项目的另外五个方案外，还创建了没有预期未来项目的基础方案。在水力发电方案中，哈拉哈河断面（HAD）的最大年入库流量减少了 1.6 千立方米，而哈拉哈河断面（HAD）的发电量减少了 9.5%。在水电和灌溉工程方案中，哈德河的年最大入河水量减少了 4.63 千立方米，发电量减少了 35.2%。最后，拟议的 TAS 流域未来开发项目将对埃及 HAD 的流量和水力发电量产生负面影响。

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引用次数: 0

Impacts of external factors in salinity patterns via numerical modeling along the Scheldt Estuary, Belgium 通过数值建模研究外部因素对比利时斯海尔德河口盐度模式的影响

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-19 DOI: 10.1016/j.ejrh.2024.102026

Boli Zhu, Danitza Salazar, Patrick Willems

Study region:

The Scheldt Estuary in Belgium

Study focus:

Understanding the mechanisms that control salt intrusion in estuaries is crucial due to its significant impact on the ecological environment and the water resource potential of estuaries. This study utilizes the Mike11 model to perform discharge (Q), water level (WL), and salinity (S) simulations in the reference and three future scenarios with sea level (SL) rise and Q reduction. A comparative analysis is conducted to evaluate the impact of individual and combined external factors (Q and WL) in the high-risk scenario S2.

New hydrological insights for the regions:

Results demonstrate that the midstream S is more sensitive to climate change compared to the upstream, leading to a transition of dominance from the freshwater zone to the mesohaline zone. The temporal evolution of S longitudinal structure exhibits significant variations throughout the year, showing increasing saltwater intrusion distance as the scenario intensify, particularly in seasonally low river flow period. It is also found that the combined effects of external factors on variable S demonstrate complex interactions, yielding varying sensitivities across different regions, rather than simply being the sum of individual factor impacts. Additionally, the correlations analysis indicates robust negative associations between upstream Q and S, and intricate and weak positive relationships between downstream WL and S.

研究区域：比利时斯海尔德河口研究重点：由于盐分入侵对河口的生态环境和水资源潜力有重大影响，因此了解控制河口盐分入侵的机制至关重要。本研究利用 Mike11 模型对参考情景和三种未来情景（海平面（SL）上升和 Q 值降低）中的排水量（Q）、水位（WL）和盐度（S）进行了模拟。结果表明，与上游相比，中游 S 对气候变化更加敏感，导致淡水区的主导地位向中盐区过渡。S 纵向结构的时间演化在全年中表现出显著的变化，随着情景的加剧，盐水入侵距离不断增加，尤其是在季节性河流流量较小的时期。研究还发现，外部因素对变量 S 的综合影响表现出复杂的相互作用，在不同地区产生不同的敏感性，而不仅仅是单个因素影响的总和。此外，相关性分析表明，上游 Q 与 S 之间存在强有力的负相关关系，而下游 WL 与 S 之间则存在错综复杂的微弱正相关关系。

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引用次数: 0

The influence of astronomical tide phases on urban flooding during rainstorms: Application to Macau 天文潮汐相位对暴雨期间城市内涝的影响：在澳门的应用

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-19 DOI: 10.1016/j.ejrh.2024.101998

Lirong Dong , Jiahong Liu , Jinjun Zhou , Chao Mei , Hao Wang , Jia Wang , Hongyuan Shi , Sana Nazli

Study region

The study area is the western part of the Macau Peninsula in China, with an area of 4.06 km².

Study focus

This study developed a coupled hydrological-hydraulic model that simulates the two-dimensional (2D) surface flow and one-dimensional (1D) drain pipe flow of compound inundation. The model was applied to Macau, China, as a study area, and the typhoon Mangkhut in 2018 was used as a case study to validate the model’s performance. Simulating compound inundation scenarios of extreme rainfall and astronomical tide and exploring the influence of astronomical tide on coastal urban inundation.

New hydrological insights for the region

Urban flood disasters are profoundly influenced by tidal levels, albeit the height of tides alone does not solely exacerbate the phenomenon. Rather, the phase of astronomical tides during rainfall also plays a crucial role in determining the severity of urban flooding. This research has revealed that when rainfall synchronizes with the recession phase of the spring tide, urban flooding conditions become acute, 17.66 % increase in total surface water volume for the scenario with the highest tidal level impact compared to the scenario with the lowest tidal level impact. This paper presents the response of coastal cities to the flooding process under different combined rainstorm-astronomical tide scenarios, to provide scientific guidance for disaster preparedness planning in coastal areas, and to improve the resilience of disasters.

研究区域研究区域为中国澳门半岛西部，面积为 4.06 平方公里。研究重点本研究开发了一种水文-水力耦合模型，用于模拟复合淹没的二维（2D）地表流和一维（1D）排水管流。该模型以中国澳门为研究区域，并以 2018 年台风 "山竹 "为案例验证了模型的性能。模拟极端降雨和天文大潮的复合淹没情景，探讨天文大潮对沿海城市淹没的影响。为该地区提供新的水文见解城市洪涝灾害受潮位影响深远，尽管潮位高低并不是加剧洪涝灾害的唯一因素。相反，降雨期间的天文潮汐相位在决定城市洪水的严重程度方面也起着至关重要的作用。这项研究表明，当降雨与春潮的退潮阶段同步时，城市内涝情况会变得严重，潮位影响最大的情况与潮位影响最小的情况相比，地表水总量增加了 17.66%。本文介绍了不同暴雨-天文大潮组合情景下沿海城市对洪水过程的响应，为沿海地区防灾规划提供科学指导，提高抗灾能力。

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引用次数: 0

Enhancing water management in Northern European lowland chalk streams: A parsimonious, high-resolution hydrological model using groundwater level as a proxy for baseflow 加强北欧低地白垩溪流的水资源管理：使用地下水位作为基流替代物的简易高分辨率水文模型

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2024-10-19 DOI: 10.1016/j.ejrh.2024.102022

Thomas Homan , Nicholas J.K. Howden , Ruth Barden , Barbara Kasprzyk-Hordern , Jan Hofman

Study region

The River Frome, a chalk stream in West Dorset, UK.

Study focus

High-resolution hydrological models are required to integrate with the current wave of high-frequency data and advance our understanding of pollutant sources, pathways, and sinks. This presents several challenges in chalk streams, as their high-permeability and unique hydrogeological characteristics often leads to complex models that are overparameterized and computationally burdensome. In this article, we develop a novel and parsimonious modelling approach to describe the surface hydrology for a chalk stream in high resolution (15-minute frequency, ≤ 100 m cross-section spacing), using groundwater levels as a proxy for spring discharges.

New hydrological insights for the region

Our results show that chalk stream dry-weather flows can be simulated accurately and parsimoniously at high-resolution (Nash-Sutcliffe efficiency = 0.97, mean relative error = 2.86 %, for a five-year period). We also show that spring discharges are the dominant form of flow accretion in all seasons and are critical to dilute sewage treatment inputs during the ecological growing season, whilst runoff and quick-flow pathways in the river valley corridor contribute a small proportion to annual flow accretion (< 5.2 %). Due to its simplicity and few parameters to calibrate, this modelling approach has broad applicability in lowland permeable catchments. Management implications include expeditious investigations of high-resolution freshwater quality responses to pollution and informing abstraction limits to sustain robust ecological conditions.

研究区域英国西多塞特郡的白垩溪流弗罗姆河。研究重点需要高分辨率水文模型来整合当前的高频数据浪潮，并推进我们对污染物来源、途径和汇的了解。白垩溪流的高渗透性和独特的水文地质特征往往导致模型过于复杂，参数过高，计算负担过重，这给白垩溪流的研究带来了诸多挑战。在本文中，我们开发了一种新颖、简洁的建模方法，利用地下水位作为春季排水量的代表，以高分辨率（15 分钟频率，断面间距≤ 100 米）描述白垩溪的地表水文。我们的研究还表明，春季排放是所有季节流量增加的主要形式，对稀释生态生长季节的污水处理输入量至关重要，而河谷走廊的径流和快速流动途径对年流量增加的贡献很小（5.2%）。由于这种建模方法简单且需要校准的参数较少，因此在低地透水集水区具有广泛的适用性。对管理的影响包括：快速调查高分辨率淡水水质对污染的反应，并告知取水限制，以维持稳健的生态条件。

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