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Goal orientation and effectiveness of water environment governance in China 中国水环境治理的目标取向与有效性
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-06-13 DOI: 10.1016/j.ecohyd.2025.100673
Juan Wang, Xilin Zhao
In order to accurately assess the multi-temporal implementation of the River Chief System (RCS) policy, this study uses the Two-Stage Difference-in-Differences (DID2S) method to evaluates the influence of RCS on the water quality of Taihu Basin with the monthly data of the water quality class from 2007 to 2017. Empirical results show that the reform has not significantly improved the water quality of Taihu Basin. However, it has significantly improved the average annual compliance rate of water quality. The study further discusses the reasons from two perspectives. First, most water quality categories in functional water areas are gradually converging toward the Grade III water quality objective established by local governments. Second, the water quality development in some Water Functional Zones has become increasingly unbalanced. Areas with relatively easy-to-control pollution are gradually meeting standards, but in other areas where improvement is challenging, water quality continues to worsen. The study reveals the ‘policy distortions’ in the implementation of the RCS and provides data support for the subsequent improvement of the system.
为了准确评估河长制(RCS)政策的多时段实施情况,本研究利用2007 - 2017年太湖流域水质等级月度数据,采用双阶段差中差法(DID2S)评价了RCS对水质的影响。实证结果表明,改革并未显著改善太湖流域水质。但显著提高了年平均水质达标率。本研究进一步从两个角度探讨了原因。首先,功能水区大部分水质类别逐渐向地方政府制定的三级水质目标趋同。二是部分水功能区水质发展日趋不平衡。污染相对容易控制的地区正在逐步达标,但在其他难以改善的地区,水质继续恶化。该研究揭示了RCS实施过程中的“政策扭曲”,为后续系统的改进提供了数据支持。
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引用次数: 0
Sub-basins identification and prioritization for ecohydrological nature-based intervention 基于自然的生态水文干预的子流域识别与优先排序
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-06-26 DOI: 10.1016/j.ecohyd.2025.100675
Nigatu Chala , Yenesew Mengiste , Yohannes Zerihun
Sub-basin identification and prioritization are critical steps in addressing ecohydrological challenges, optimizing nature-based water conservation strategies, and study rainfall-runoff processes. In Ethiopia, the intense summer rainy season frequently triggers flood hazards, particularly in the Upper Awash River Basin. To mitigate these risks, detailed sub-basin assessments are essential for designing targeted intervention, such as nature-based flood management solutions. This study employed an integrated approach combining hydrological modeling, geospatial analysis, multi-criterial decision-making (MCDM), and ranking score number techniques. The HECHMS software was used to simulate rainfall runoff processes and divide the study area into sub-basins using a Digital Elevation Model (DEM). ArcGIS tools processes satellite imagery and environmental parameters to reclassify and analyze spatial data for sub-basins. The analytical Hierarchy process (AHP), implemented via R packages, assigned weights to the parameter. Then, a compound weighted rank score number (WRSN) system applied to rank sub-basins. Sub-basin-2 received the lowest composite number score marking it as the highest priority for intervention. In contrast, sub-basin-1 scored the highest, indicating lower urgency. The HEC HMS rainfall-runoff simulation showed strong agreement with observed data at outlet points. Performance metrics confirmed the model ‘s reliability: RMSE, NSE, percent Bias, and R2 were found to be 0.28,0.92, 1.02, and 0.93 at sink of the study area respectively. This methodology provides a robust framework for identifying priority sub-basins, enabling policy makers and conservationists to allocate resources effectively.
子流域识别和优先排序是解决生态水文挑战、优化基于自然的水资源保护策略和研究降雨径流过程的关键步骤。在埃塞俄比亚,强烈的夏季雨季经常引发洪水灾害,特别是在阿瓦什河上游流域。为了降低这些风险,详细的子流域评估对于设计有针对性的干预措施至关重要,例如基于自然的洪水管理解决方案。本研究采用水文建模、地理空间分析、多准则决策(MCDM)和评分排序技术相结合的综合方法。利用HECHMS软件模拟降雨径流过程,并利用数字高程模型(DEM)将研究区划分为子流域。ArcGIS工具对卫星图像和环境参数进行处理,对子流域的空间数据进行重新分类和分析。通过R包实现的层次分析法(AHP)为参数分配权重。在此基础上,应用复合加权分级评分系统对子盆地进行分级。亚盆地2综合得分最低,为干预优先级最高。相比之下,亚盆地1得分最高,表明紧迫性较低。HEC HMS降雨径流模拟结果与出口观测数据吻合较好。绩效指标证实了模型的可靠性:在研究区域的汇处,RMSE、NSE、percent Bias和R2分别为0.28、0.92、1.02和0.93。该方法为确定优先子流域提供了一个强有力的框架,使决策者和保护主义者能够有效地分配资源。
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引用次数: 0
Effects of diclofenac, ibuprofen, ionic liquid and drug-IL mixtures on various environmental elements 双氯芬酸、布洛芬、离子液体和药物- il混合物对各种环境元素的影响
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-05-28 DOI: 10.1016/j.ecohyd.2025.100671
Barbara Pawłowska
Ionic liquids (ILs) are a large group of compounds that have found applications in the pharmaceutical industry, including as solvents, or as part of API (active pharmaceutical ingredient) and IL combinations to improve drug properties. However, to date, there have been no studies to determine the simultaneous environmental effects of ILs and pharmaceuticals. Therefore, the present study was designed to determine and compare the toxicity of drugs: ibuprofen (IBU) and diclofenac (DIC) and the ionic liquid 1‑butyl‑3-methylimidazolium chloride (BMIMCl), as well as drug-ILs mixtures on 6 test organisms (Sorghum saccharatum, Lepidium sativum, Sinapis alba, Spirodela polyrhiza, Daphnia magna, Heterocypris incongruens) using biotests. The results indicate that the compounds tested may have negative effects on the test organisms. The greatest effect of the tested compounds was on the inhibition of leaf growth of Spirodela polyrhiza. The magnitude of the effect of each compound depended on the type of compound, the concentration used and the species of organism on which the compound or mixture acted.
离子液体(ILs)是一大类已在制药工业中得到应用的化合物,包括作为溶剂,或作为API(活性药物成分)和IL组合的一部分来改善药物性能。然而,到目前为止,还没有研究确定il和药物同时对环境的影响。因此,本研究旨在采用生物试验方法测定和比较布洛芬(IBU)和双氯芬酸(DIC)药物以及离子液体1 -丁基- 3-甲基咪唑氯(BMIMCl)药物及其混合物对6种试验生物(高粱、sativum、Sinapis alba、Spirodela polyrhiza、Daphnia magna、Heterocypris incongruens)的毒性。结果表明,所测试的化合物可能对被测试生物有负面影响。所试化合物对多根螺旋藻叶片生长的抑制作用最大。每种化合物的影响程度取决于化合物的类型、使用的浓度以及化合物或混合物作用的生物体种类。
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引用次数: 0
Hydrological effects of three plantations in hilly regions of South China 华南丘陵区三种人工林的水文效应
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-03-08 DOI: 10.1016/j.ecohyd.2025.100648
Qian Wang , Ping Zhao , Xia Chen , Xiuhua Zhao , Liwei Zhu
Exotic broadleaf Acacia mangium Willd., native broadleaf Schima wallichii Choisy, and native coniferous Cunninghamia lanceolata (Lamb.) Hook are main species for vegetation restoration in southern China. To assess whether these plantations remain suitable for continued planting after more than 30 years on degraded hilly lands, we investigated the hydrological effects of their canopy, litter, and soil layers. Canopy interception was calculated by subtracting measured throughfall and stemflow from total rainfall, while the water-holding capacities of litter and soil were measured using indoor immersion and ring knife methods, respectively. Our results show that the hydrological effects of the canopy and litter layers in the two broadleaf plantations were superior to those in the coniferous C. lanceolata plantation. In 2017 and 2018, the canopy interception/precipitation ratios ranked: S. wallichii (13.1–20.7%)> A. mangium (16.2–10.2%) > C. lanceolata (11.3–11.6%). Among the three plantations, the native broadleaf species S. wallichii exhibited the highest canopy interception under extreme rainfall, suggesting it may be better suited for afforestation in southern China, where extreme rainfall events are becoming increasingly frequent. For the total effective water storage capacity of litter, the ranking was: A. mangium (4.6±2.4 t·hm⁻²) > S. wallichii (2.7±1.8 t·hm⁻²) > C. lanceolata (2.4±1.4 t·hm⁻²). Exotic A. mangium had the highest water-holding capacity in both undecomposed and decomposed litter layers, and its soil water-holding capacity was superior to the native species. These results indicate that A. mangium improves hydrological functions in litter and soil layers, conserving water, delaying surface runoff, and reducing soil erosion, while its potential invasive risks to biodiversity and ecosystem stability should also be considered. For average soil water storage capacity, the ranking was: A. mangium (6373.0±54.4 t hm-2) > C. lanceolata (5955.1±43.0 t hm-2) > S. wallichii (5909.8 ±102.4 t hm-2). Since there were no significant differences in soil hydrological effects between S. wallichii and C. lanceolata, C. lanceolata exhibited the weakest overall hydrological benefits. Our findings highlight the critical importance of selecting appropriate species for afforestation projects to optimize hydrological functions and adapt to changing rainfall patterns in southern China.
外来阔叶金合欢野生。本地阔叶木荷和本地针叶杉木(Lamb.)钩子是华南地区植被恢复的主要物种。为了评估这些人工林在退化丘陵地30多年后是否仍然适合继续种植,我们研究了它们的冠层、凋落物和土层的水文效应。冠层截留量通过从总降雨量中减去测量的穿透流量和茎流来计算,而凋落物和土壤的持水量分别采用室内浸泡法和环刀法测量。结果表明,两种阔叶林林冠层和凋落物层的水文效应均优于针叶杉木林。2017年和2018年林冠截留/降水比依次为:白桦(13.1 ~ 20.7%)、马头松(16.2 ~ 10.2%)、杉木(11.3 ~ 11.6%)。在3种人工林中,本土阔叶树种白桦在极端降雨条件下的冠层截留量最大,可能更适合极端降雨日益频繁的南方地区造林。枯枝落叶的总有效储水量排序为:A. mangium(4.6±2.4 t·hm⁻²);S. wallichii(2.7±1.8 t·hm⁻²);C. anceolata(2.4±1.4 t·hm⁻²)。在未分解凋落物层和分解凋落物层中,外来芒草的持水能力最高,其土壤持水能力优于本地种。这些结果表明,芒草具有改善凋落物和土层的水文功能,具有保水、延缓地表径流和减少土壤侵蚀的作用,但也应考虑其对生物多样性和生态系统稳定性的潜在入侵风险。土壤平均储水量排序为:马菖蒲(6373.0±54.4 t hm-2)、杉木(5955.1±43.0 t hm-2)、杉木(5909.8±102.4 t hm-2)。由于杉木和杉木的土壤水文效应没有显著差异,杉木的整体水文效益最弱。我们的研究结果强调了为中国南方的造林项目选择合适的树种对于优化水文功能和适应不断变化的降雨模式的重要性。
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引用次数: 0
Scaling up analysis of human impacts on hydrological connectivity in Mediterranean viticultural landscapes: From hillslope to a watershed perspective 地中海葡萄栽培景观中人类对水文连通性影响的放大分析:从山坡到流域视角
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-10-22 DOI: 10.1016/j.ecohyd.2025.100700
Laura Cambronero , Yang Yu , Jesús Rodrigo-Comino
In land management and precision viticulture (PV), the integration of Geographic Information Systems (GIS) and remote sensing has enabled the detailed study of geomorphological processes and hydrological patterns across multiple scales. Despite its potential, this approach remains underutilized compared to applications like pest control, disease detection, and vegetation assessment. This research addresses this gap by proposing a multiscale fluvio-geomorphological and hydrological analysis to enhance sustainable soil management and vineyard conservation. Using open-access national remote sensing data (Digital Surface Models) and drone-based imagery, a 48 km² watershed and a 1 km-long vineyard plantation were analyzed. The results revealed an elongated watershed with steep slopes and high drainage density, influencing sediment deposition and flow direction, which directly affect the vineyard plantation. The watershed exhibited a predominant northward flow (26.2 %), while vineyard-level flows varied, primarily toward the east (20 %) and northwest (16.5 %), affecting the roads, and flow paths. The Index of Connectivity (IC) highlighted higher hydrological connectivity in the vineyard, with 85.4 % classified as high IC, compared to 18.1 % in the broader watershed. These findings highlight the need to incorporate geomorphological processes into PV and land management to avoid misunderstandings. By analyzing hydrological connectivity and sediment transport at multiple scales, this study reinforces the understanding of the processes that shape vineyard landscapes and provides a basis for future research aimed at integrating this knowledge into soil conservation and sustainable management strategies.
在土地管理和精准葡萄栽培(PV)中,地理信息系统(GIS)和遥感的集成使得对多尺度地貌过程和水文模式的详细研究成为可能。尽管具有潜力,但与病虫害防治、疾病检测和植被评估等应用相比,这种方法仍未得到充分利用。本研究通过提出多尺度河流地貌和水文分析来解决这一差距,以加强可持续土壤管理和葡萄园保护。利用开放获取的国家遥感数据(数字地表模型)和基于无人机的图像,对一个48平方公里的流域和一个1公里长的葡萄园种植园进行了分析。结果表明:流域呈狭长型,坡度陡,排水密度大,影响了泥沙的沉积和流向,直接影响了葡萄园的种植。流域以向北流动为主(26.2%),而葡萄园水平水流变化较大,主要向东(20%)和向西北(16.5%)流动,影响了道路和水流路径。连通性指数(IC)强调了葡萄园较高的水文连通性,85.4%被列为高IC,而更广泛的流域为18.1%。这些发现强调了将地貌过程纳入光伏和土地管理以避免误解的必要性。通过分析多尺度的水文连通性和沉积物运输,本研究加强了对塑造葡萄园景观过程的理解,并为未来的研究提供了基础,旨在将这些知识整合到土壤保持和可持续管理策略中。
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引用次数: 0
Connecting the dots: Spatial connectivity and ecological dynamics in a tropical river catchment 连接点:热带河流集水区的空间连通性和生态动态
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-09-30 DOI: 10.1016/j.ecohyd.2025.100698
Grite Nelson Mwaijengo
The unique branching geometry of river networks distinguishes them from other ecological systems and strongly influences key ecological processes. Yet, models that explicitly account for dendritic structure and flow direction remain underused. We applied a spatial stream network model (SSNM) to examine spatial patterns of water chemistry and benthic macroinvertebrates in the Usa-Kikuletwa River catchment, northeastern Tanzania, using data from 40 monitoring sites. SSNMs incorporate hydrologic distances among flow-connected, flow-unconnected, and Euclidean sites, enabling explicit representation of river network dependencies. We found spatial autocorrelation in both water chemistry and macroinvertebrate indices at fine (≤2 km) and broad (>10 km) scales. SSNMs explained up to 31.7% of variance, outperforming Euclidean models. Broad-scale tail-up (upstream flow-connected) models highlighted the role of upstream processes and hydrological connectivity in water chemistry, while tail-down (downstream-directed) models better explained macroinvertebrate variation, suggesting influences of dispersal, drift, and broad-scale landscape factors. Our findings demonstrate the utility of SSNMs for capturing dendritic spatial dependencies and improving predictions in Afro-tropical river systems.
河网独特的分支几何形态使其区别于其他生态系统,并强烈影响关键的生态过程。然而,明确解释树枝状结构和流动方向的模型仍未得到充分利用。利用40个监测点的数据,应用空间流网络模型(SSNM)研究了坦桑尼亚东北部Usa-Kikuletwa河流域水化学和底栖大型无脊椎动物的空间格局。ssnm结合了水流连接、水流不连接和欧几里得地点之间的水文距离,从而能够明确表示河流网络的依赖关系。在细尺度(≤2 km)和宽尺度(≤10 km)上,水化学和大型无脊椎动物指数均存在空间自相关性。ssms解释了高达31.7%的方差,优于欧几里得模型。大尺度尾向上(上游水流连接)模型强调了上游过程和水文连通性在水化学中的作用,而尾向下(下游导向)模型更好地解释了大型无脊椎动物的变化,表明了扩散、漂移和大尺度景观因素的影响。我们的研究结果证明了SSNMs在捕获树突空间依赖性和改进非洲热带河流系统预测方面的实用性。
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引用次数: 0
From deficit to balance: Identifying blue-green infrastructure networks based on trade-offs and synergies between water and terrestrial ecosystem services in a water sensitive region 从赤字到平衡:在水敏感地区确定基于水和陆地生态系统服务之间的权衡和协同作用的蓝绿色基础设施网络
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-04-03 DOI: 10.1016/j.ecohyd.2025.100656
Yajie Yang , Qiwei Ma
Rapid urbanization has led to the expansion of urban construction land, severely disrupting the stability of water and terrestrial ecosystems. Effectively balancing water ecosystem and terrestrial ecosystem has become a critical issue for high-quality urban development. This study focuses on the Ecological Green Integration Demonstration zone (EGIDZ) in the Yangtze River Delta, China as the research area. This research first establishes a comprehensive ES evaluation system from the perspectives of water ecosystem services (ESs) and terrestrial ESs, and evaluates them using the InVEST model. Secondly, hotspot analysis is employed to analyze the spatial clustering characteristics of the comprehensive water ESs and terrestrial ESs. Using the four-quadrant model, a coordinate system was established with water ES as the X-axis and terrestrial ES as the Y-axis, classifying the study area into four types: high water ES-high terrestrial ES, high water ES-low terrestrial ES, low water ES-high terrestrial ES, and low water ES-low terrestrial ES. Hotspot analysis was conducted using ArcGIS 10.8 to extract the spatial relationships between water-terrestrial hotspots and coldspots, which were then mapped onto the four-quadrant model. Based on Z-values, hotspot areas (Z > 1.65) were categorized as surplus areas, coldspot areas (Z < -1.65) as deficit areas, and non-significant areas as balance areas. Third, based on an analysis of ESF directions, hubs are extracted by assessing the characteristics of supply-demand between surplus and deficit areas. Then, using circuit theory, the BGIN is constructed based on hubs and resistance surface. The resistance surfaces include a water resistance surface and a terrestrial resistance surface, both of which are constructed by equally weighting and overlaying three resistance factors with comparable influence. This facilitating ecological flows from surplus hubs to deficit hubs and achieving a dynamic balance between them. Finally, ecological management zoning was conducted for sustainable ecological protection and urban development. Results identified 147 water-dominated ESFs and 148 terrestrial-dominated ESFs, forming a uniform network structure. Stability and connectivity tests through random and targeted attacks confirm that BGIN exhibits greater resilience and connectivity than only blue or green infrastructure networks.
快速城市化导致城市建设用地扩大,严重破坏了水生态系统和陆地生态系统的稳定性。水生态系统与陆地生态系统的有效平衡已成为城市高质量发展的关键问题。本研究以中国长三角生态绿色一体化示范区为研究区域。本研究首先从水生态系统服务(ESs)和陆地生态系统服务(ESs)两方面构建了综合的生态系统服务评价体系,并利用InVEST模型对其进行评价。其次,采用热点分析方法,分析了综合水ESs和陆地ESs的空间聚类特征。利用四象限模型,建立了以水面ES为x轴、地面ES为y轴的坐标系,将研究区划分为高水位ES-高地面ES、高水位ES-低地面ES、低水位ES-高地面ES、低水位ES-低地面ES四种类型。利用ArcGIS 10.8软件进行热点分析,提取水陆热点与冷点的空间关系,并将其映射到四象限模型中。根据Z值,将热点区域(Z < 1.65)划分为盈余区域,将冷点区域(Z < -1.65)划分为赤字区域,将非显著区域划分为平衡区域。第三,在分析ESF方向的基础上,通过评估盈余和赤字地区之间的供需特征,提取出中心。然后,利用电路理论,构建了基于集线器和电阻曲面的BGIN。所述阻力面包括水阻力面和地阻力面,这两种阻力面均由具有可比影响的三个阻力因素加权叠加而成。这促进了从盈余中心到赤字中心的生态流动,并实现了它们之间的动态平衡。最后进行生态管理区划,实现生态可持续保护和城市发展。结果发现147个以水为主的esf和148个以陆地为主的esf,形成了统一的网络结构。通过随机和有针对性的攻击进行的稳定性和连通性测试证实,BGIN比蓝色或绿色基础设施网络具有更强的弹性和连通性。
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引用次数: 0
Spatiotemporal response of water balance components under projected land use/land cover change in the Upper Omo-Gibe River Basin, Ethiopia 埃塞俄比亚Omo-Gibe上游流域土地利用/覆被变化预估下水分平衡分量的时空响应
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-08-14 DOI: 10.1016/j.ecohyd.2025.100689
Paulos Lukas , Assefa M. Melesse , Tadesse Tujuba Kenea
The evaluation of a river basin's water balance and related hydrological processes is crucial for managing, monitoring, and predicting water resources as well as using them sustainably. The main objective of this study is to model and evaluate the response of hydrological components to land use/land cover dynamics via hydrological and remote sensing techniques in the Upper Omo-Gibe River Basin, Ethiopia. The sensitive parameters for the model simulation were thoroughly examined and selected. The findings provide significant information on the response of water balance components to LULC change. Between 1997 and 2004, it was observed that the primary factors accelerating the transformation were a rapid increase in agricultural land (46.89 %) and a significant loss of forest cover. Surface runoff (Surf_Q) increased a (4.7 %); increase whereas groundwater recharge (Gw_Q) and lateral flow (Lat_Q) decreased (17.63 %) and (9.54 %), respectively. The model simulation results revealed that surface runoff, evapotranspiration, lateral flow, and groundwater recharge accounted for 22.07 %, 43.95 %, 0.83 %, and 28.88 %, respectively, of the total flow in the present study. The increase in impervious surfaces due to intensified land competition among various sectors contributes to the reduction in the infiltration of water into the ground and accelerates Surf_Q in the catchment. Therefore, local, regional, and national policy interventions are needed to ensure efficient planning for water resource management in the Gibe-III catchment of the Omo-Gibe River Basin.
流域水平衡和相关水文过程的评估对于水资源的管理、监测和预测以及可持续利用至关重要。本研究的主要目的是通过水文和遥感技术模拟和评估埃塞俄比亚上奥莫吉贝河流域水文成分对土地利用/土地覆盖动态的响应。对模型仿真的敏感参数进行了全面的检查和选择。这些发现为研究水分平衡组分对LULC变化的响应提供了重要信息。1997 - 2004年,农业用地的快速增加(46.89%)和森林覆盖的显著减少是加速这一转变的主要因素。地表径流(Surf_Q)增加了4.7%;地下水补给(Gw_Q)和横向流量(Lat_Q)分别减少(17.63%)和(9.54%)。模型模拟结果表明,地表径流、蒸散发、侧流和地下水补给分别占总流量的22.07%、43.95%、0.83%和28.88%。由于各部门之间土地竞争加剧,不透水地表的增加有助于减少渗入地下的水,并加速集水区的Surf_Q。因此,需要地方、区域和国家的政策干预措施,以确保对Omo-Gibe河流域Gibe-III集水区的水资源管理进行有效规划。
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引用次数: 0
Influence of river regulation on macroinvertebrate assemblages in a semiarid region: A trait-based approach 河流调控对半干旱区大型无脊椎动物群落的影响:一种基于性状的方法
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-04-27 DOI: 10.1016/j.ecohyd.2025.100662
Mirian Roxana Calderon , Mariana Beatriz Jofré , César Américo Almeida , Juan Manuel Pérez Iglesias , Silvia Patricia González , María Laura Miserendino
Water availability is critical for economic and social development, especially in arid and semi-arid regions. Dams, while beneficial for humans, alter the natural regime of rivers, impacting natural ecosystems. This study used a trait-based approach to determine which attributes allow macroinvertebrates to thrive under the new environmental configuration imposed by flow regulation. To link traits to the impacts of dams, we selected 13 high-gradient streams and compared unregulated and regulated reaches, where we (i) evaluated macroinvertebrate trait responses to hydromorphological characteristics, water chemistry, and habitat shifts and ii) identified the traits associated with stress caused by flow regulation. We classified macroinvertebrates according to 13 traits and 46 modalities. We performed an RLQ analysis, which links environmental features (R) with biological traits (Q) through taxonomic composition (L) followed by a fourth-corner analysis to further confirm trait-environment associations. Body shape, locomotion, feeding habits, respiration, adult ability to fly, flow preference, swimming ability, and adaptations to flow were the traits that most strongly influenced taxa composition. Cylindrical bodies (Oligochaetes), burrowers or clingers, poor swimming abilities, filtering collectors (Simuliidae), non-flying adults, and respiration by pigments (Chironomidae), spiracles (other dipterans), or lung respiration (Mollusca) are some of the traits that enabled organisms to persist at regulated sites. Some environmental features that filtered traits were total width of the channel, discharge, and water chemistry. This investigation provides evidence that trait-based analyses are valuable tools for assessing the ecological health of dam-impacted rivers. Identifying key biological traits will enhance biomonitoring programs and the management of regulated rivers.
水的供应对经济和社会发展至关重要,特别是在干旱和半干旱地区。水坝虽然对人类有益,但却改变了河流的自然状态,影响了自然生态系统。本研究使用了一种基于性状的方法来确定哪些属性允许大型无脊椎动物在流量调节施加的新环境配置下茁壮成长。为了将这些特征与水坝的影响联系起来,我们选择了13条高梯度河流,并比较了不受管制和受管制的河流,在那里我们(i)评估了大型无脊椎动物对水文形态特征、水化学和栖息地变化的特征响应,以及ii)确定了与流量调节引起的压力相关的特征。我们根据13个特征和46种模式对大型无脊椎动物进行了分类。我们进行了RLQ分析,通过分类组成(L)将环境特征(R)与生物性状(Q)联系起来,然后进行第四角分析以进一步确认性状与环境的关联。体型、运动、摄食习性、呼吸、成虫飞行能力、水流偏好、游泳能力和对水流的适应是影响类群组成最强烈的特征。圆柱形体(寡毛纲)、穴居动物或黏附动物、较差的游泳能力、过滤收集器(拟蝇科)、不会飞行的成虫、色素呼吸(手拟蝇科)、气门(其他双翅目动物)或肺呼吸(软体动物)是使生物体能够在受管制的地点生存的一些特征。过滤特性的环境特征包括河道总宽度、流量和水化学。本研究证明,基于特征的分析是评估受水坝影响河流生态健康的重要工具。确定关键的生物特征将加强生物监测项目和对受管制河流的管理。
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引用次数: 0
Improving water footprint assessment in agriculture: A high-resolution SWAT model study of the Ceyhan Basin, Türkiye 改善农业水足迹评估:杰伊汉盆地的高分辨率SWAT模型研究,<s:1> rkiye
IF 2.2 4区 环境科学与生态学 Q2 ECOLOGY Pub Date : 2025-12-01 Epub Date: 2025-04-28 DOI: 10.1016/j.ecohyd.2025.100664
Muhammed Sungur Demir, Abdullah Muratoglu
The Water Footprint (WF) concept is essential for assessing freshwater use and guiding sustainable water management. However, existing WF studies often lack sufficient spatial and temporal resolution, leading to inaccuracies in regional water-use assessments. This study enhances WF estimation for the Ceyhan Basin, Türkiye, by integrating the SWAT hydrological model (2011–2020) to improve effective precipitation estimates, capture spatial and temporal WF variations, and address data inconsistencies. Using a refined green WF calculation method, WF analyses were conducted for eight major crops, representing ∼90 % of the basin's cereal-cultivated area.
Results revealed significant spatial variability, with up to fivefold differences in WF for some crops. Cotton exhibited the highest WF (2822 m³/t), while maize accounted for the largest freshwater consumption (289 million m³). Blue WF was most pronounced in the northern basin due to insufficient precipitation, whereas green WF dominated in the south. Temporal trends showed peak WF in May for autumn/winter-sown crops and in July for spring-sown crops. High demand for irrigation, maize, sunflower, cotton, and potatoes during summer underscores the need for sustainable water resource management. These findings highlight the importance of region-specific cropping strategies and optimized irrigation scheduling to enhance water-use efficiency in the Ceyhan Basin.
水足迹(WF)概念对于评估淡水利用和指导可持续水资源管理至关重要。然而,现有的WF研究往往缺乏足够的空间和时间分辨率,导致区域用水评估不准确。本研究通过整合SWAT水文模型(2011-2020),增强了 rkiye杰伊汉盆地的水通量估算,以改进有效的降水估算,捕捉水通量的时空变化,并解决数据不一致的问题。采用一种改进的绿色WF计算方法,对占流域谷物种植面积90%的8种主要作物进行了WF分析。结果显示出显著的空间变异,某些作物的WF差异高达5倍。棉花耗水量最大(2822 m³/t),玉米耗水量最大(2.89亿m³/t)。由于降水不足,蓝色WF在盆地北部最为明显,而绿色WF则以南部为主。秋冬作物WF峰值出现在5月,春播作物WF峰值出现在7月。夏季对灌溉、玉米、向日葵、棉花和土豆的高需求突出了可持续水资源管理的必要性。这些研究结果强调了区域特定种植策略和优化灌溉计划对提高杰伊汉流域水资源利用效率的重要性。
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Ecohydrology & Hydrobiology
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