Catena最新文献

{"title":"The response of soil microbial necromass carbon to global change: A global meta-analysis","authors":"Wenao Wu ,&nbsp;Jiguang Feng ,&nbsp;Xudong Wang ,&nbsp;Jiatian Xiao ,&nbsp;Wenkuan Qin ,&nbsp;Biao Zhu","doi":"10.1016/j.catena.2024.108693","DOIUrl":"10.1016/j.catena.2024.108693","url":null,"abstract":"<div><div>Soil organic carbon (SOC) is the largest carbon pool of terrestrial ecosystems and it is vulnerable to global change. As an important component of SOC, soil microbial necromass carbon (MNC) largely determines the dynamics of SOC. However, the response of MNC to global change on a global scale is not well understood. Here, we conducted a meta-analysis to assess the global response of MNC to warming, altered precipitation, nutrient addition, and elevated CO₂. Our results indicated that MNC was resistant to most global change factors. However, decreased precipitation reduced MNC by 6.79 % and fungal necromass carbon (FNC) by 8.99 %. In contrast, N addition had a favorable effect on MNC (+8.60 %), FNC (+7.61 %), and bacterial necromass carbon (BNC, +12.12 %). Additionally, initial environmental and experimental conditions affected the response of MNC to N addition. Notably, we found that MNC was more responsive in topsoil than in subsoil, which could account for the depth-dependent response of SOC. Furthermore, we found that the response of soil total nitrogen content and that of microbial biomass carbon mediated the MNC response to N addition. Overall, this study enhances our understanding of how MNC responds to global change on a global scale. In future studies, the response of MNC to global change in tropical/boreal regions, in long-term experiments, and in subsoils needs more attention.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108693"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineral, molecular composition and ecosystem type jointly determine the stability of soil organic carbon on the Qinghai-Tibetan Plateau","authors":"Jun Gu ,&nbsp;Dongxue Li ,&nbsp;Fei Yang ,&nbsp;Xiao-Dong Song ,&nbsp;Ke-Yang Gong ,&nbsp;Gan-Lin Zhang","doi":"10.1016/j.catena.2024.108638","DOIUrl":"10.1016/j.catena.2024.108638","url":null,"abstract":"<div><div>The magnitude of soil organic carbon (SOC) response to climate warming is contingent upon its stability. However, due to limited data, the spatial patterns and drivers of SOC stability remain unclear, particularly in alpine regions. Thermal analysis reveals the energy density of SOC, thus indirectly reflecting its stability. This study utilized the thermogravimetric index (TG-T50) to quantify the thermal stability of SOC and employed Nuclear Magnetic Resonance spectroscopy to characterize its molecular composition across the Qinghai-Tibetan Plateau (QTP). SOC thermal stability was found to decrease from the northwest to the southeast of the QTP. A strong positive correlation was observed between SOC thermal stability and molecular composition (r = 0.71, <em>P</em> &lt; 0.001). Structural equation modeling results indicated that ecosystem type was the most important factor influencing SOC thermal stability, followed by mineral and climate variables. Changes in ecosystem type not only alter the quality of soil carbon inputs but also involve variations in climate and soil properties, thereby affecting SOC stability. Those findings highlight that SOC stability is an ecosystem-dependent property. The results show that SOC thermal stability is governed by its molecular composition, mineral protection, and ecosystem type in the QTP. These findings provide substantial evidence towards a more comprehensive understanding of SOC stability on the QTP and assist in predicting the dynamic changes of SOC in response to climate change.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108638"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uncovering soil preferential flow induced by different drip irrigation emitter settings: Insights integrating wetting-fronts image variability, HYDRUS-2D, and active region model","authors":"Rui Chen ,&nbsp;Vilim Filipović ,&nbsp;Jinzhu Zhang ,&nbsp;Wenhao Li ,&nbsp;Hanchun Ye ,&nbsp;Jihong Zhang ,&nbsp;Zhenhua Wang","doi":"10.1016/j.catena.2024.108669","DOIUrl":"10.1016/j.catena.2024.108669","url":null,"abstract":"<div><div>Drip irrigation has gained widespread adoption in arid regions globally to counteract the water scarcity, yet the non-uniformity of soil water flow under drip irrigation remains inadequately understood. This study presented an indoor infiltration experiment with two soil types (sandy loam and sandy), three emitter sapcing (10 cm, 20 cm, and 30 cm), and two discharge rates (3 L/h and 4 L/h). We analyzed wetting front image variability, using HYDRUS-2D to interpret fractal parameters in active region model during infiltration. Initially, the wetting front was unstable, with a preferential flow ratio dropping from 90 % to 20 % and a variation coefficient decreasing from approximately 2 to below 1 across both soil types. The preferential pathways were found forming in a finger shape ways. Fractal parameters peaked at 15–30 min in sandy loam and 5–10 min in sandy soils, reflecting this instability. HYDRUS-2D data confirmed the non-uniformity indicated by the active region model, showing reduced fractal parameters with wider emitter spacing in sandy soils and an increase with larger spacing in sandy loam. Moreover, the principal component analysis identified optimal irrigation parameters: a 20 cm spacing with a 4 L/h discharge for sandy loam and a 40 cm spacing with the same discharge for sandy soils. Our research confirmed the presence of soil preferential flow even under drip irrigation and developed a new evaluation framework to assess the effectiveness of various drip irrigation parameters, considering soil preferential flow. This research offers new insights into optimizing drip irrigation in arid regions, enhancing water management in these areas.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108669"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Landslide susceptibility prediction in the loess tableland considering geomorphic evolution","authors":"Xiaokang Liu ,&nbsp;Shuai Shao ,&nbsp;Chen Zhang ,&nbsp;Shengjun Shao","doi":"10.1016/j.catena.2024.108668","DOIUrl":"10.1016/j.catena.2024.108668","url":null,"abstract":"<div><div>To explore the relationship between the loess tableland geomorphic evolution and landslide susceptibility, a loess tableland area in the northern of Xi’an City was selected in this study. The study area was divided into four areas according to the type of loess tableland. A complete historical landslide inventory was created and 11 landslide factors were selected. Landslide susceptibility prediction was performed for the subarea and the whole area based on the SVM and RF models, respectively, and several landslide susceptibility maps were generated. The results show that the prediction of landslide susceptibility in loess tableland areas needs to take into account the influence of its landscape evolution, and more accurate results can be obtained by calculating individually for different sub-areas. The RF model has strong performance in landslide susceptibility prediction when considering the tableland evolution, while the SVM model is better when considering the whole region as a whole. Multiple factors, such as human activities and river erosion, have increased the landslide susceptibility of the residual tableland phase, and repeated landslides along the tableland margins have led to a continuous reduction of the loess tableland surface. Given the importance of tableland landforms in the Loess Plateau region, a framework for susceptibility mapping and zonation was proposed, which is suitable for loess tableland regions where multiple developmental phases co-exist. This study strengthens the understanding of landslide development and susceptibility in response to the landscape evolution of the loess tableland and provides support for disaster prevention and mitigation and land planning.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108668"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the soil moisture-vegetation mutual feedback relationship in different climatic regions of mainland China","authors":"Zhaoqiang Zhou ,&nbsp;Ping Xue ,&nbsp;Xin Zhou ,&nbsp;Tian Wang ,&nbsp;Yibo Ding ,&nbsp;Yiyang Zhao ,&nbsp;Peng Chen ,&nbsp;Xiaowen Wang","doi":"10.1016/j.catena.2024.108684","DOIUrl":"10.1016/j.catena.2024.108684","url":null,"abstract":"<div><div>Exploring the mutual feedback relationship between vegetation and soil moisture (SM) is highly important for water resource management, soil and water conservation and terrestrial carbon sinks under changing environment. However, the mutual feedback relationship between vegetation and SM is not fully understood. To this end, this study firstly introduced convergent cross mapping (CCM) to evaluate the feedback relationship between NDVI and SM in in different climatic regions of China. The spatial trend coupling relationship was also analyzed. The results indicated that (1) NDVI was positively with SM in most areas of China, while the proportions of negatively correlated and uncorrelated areas increase with depth. (2) The causality is different for different depth. NDVI and SM1/SM2/SM3 were mutual feedback in most areas of China (65.52%/70.41%/76.4%). In areas with poor correlation results, CCM can better explain the relationship between SM and NDVI. (3) The coupling relationship between SM and NDVI is primarily divided into the co-increasing area of the northeastern Qinghai-Tibet Plateau, the vegetation greening-SM decreasing area in Central China, and the mixed area in Northeast China. The research results have important reference significance for ecological engineering management, the sustainable use of land and water resources, and carbon sequestration.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108684"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can environmental variables, high sampling density and machine learning deliver detailed maps of soil organic carbon and carbon stock in tropical regions?","authors":"Fernanda Almeida Bócoli ,&nbsp;Diego Ribeiro ,&nbsp;Marcelo Mancini ,&nbsp;Leonardo Augusto de Sousa ,&nbsp;Samara Martins Barbosa ,&nbsp;Milson Evaldo Serafim ,&nbsp;Bruno Montoani Silva ,&nbsp;Junior Cesar Avanzi ,&nbsp;Luiz Roberto Guimarães Guilherme ,&nbsp;Nilton Curi ,&nbsp;Sérgio Henrique Godinho Silva","doi":"10.1016/j.catena.2025.108718","DOIUrl":"10.1016/j.catena.2025.108718","url":null,"abstract":"<div><div>Studies on the spatial variability of soil organic carbon (SOC) and carbon stocks (CS) at detailed scales are scarce and are mostly conducted in temperate regions, requiring efforts to map SOC and CS with finer resolutions in tropical regions. This work aimed to (1) characterize the spatial distribution of SOC and CS under different land uses; (2) predict SOC and CS using environmental variables and proximal and remote sensing, testing 22 combinations of covariate sets; and (3) map SOC and CS at detailed scale (1 sample per 3.5 ha) and 12.5 m of resolution. 236 soil samples were collected: 180 in a regular grid (200 x 200 m) in two depths (0–20 and 80–100 cm) for model calibration and 56 for validation. Samples underwent SOC and texture analyses, and were scanned by proximal sensors (portable X-ray fluorescence – pXRF, and magnetic susceptibility – MS). Terrain attributes (TA) were calculated from a digital elevation model (12.5 m) and the normalized difference vegetation index (NDVI) and insolation indices were obtained from Sentinel-2 and Landsat 8 imagery. The Random Forest (RF) algorithm was used for modeling. The highest SOC contents were found in an Organossolo (Histosol) under pasture followed by soils under native forest and pasture. High variation of SOC and CS was found even within the same land use, soil class and parent material. The best prediction achieved an R² = 0.47 (SOC at 0–20 cm). Subsurface (80–100 cm) predictions were less accurate. Soil texture, remotely sensed data (NDVI, TA and radiation) and parent material were the most important predictors. High sample density along with environmental variables provided satisfactory accuracy (R² = 0.47). However, since high SOC and CS spatial variation was found, future works are encouraged to obtain more accurate SOC and CS maps at high resolution, e.g., adopting other variables to enhance the results.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108718"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Permafrost as a source of mineral weathering bacteria: Implications of active layer thickening on James Ross Island, Antarctica","authors":"Lenka Micenková ,&nbsp;Martin Kadlec ,&nbsp;Ivana Mašlaňová ,&nbsp;Ivo Sedláček ,&nbsp;Pavel Švec ,&nbsp;Vojtěch Kovařovic ,&nbsp;Roman Pantůček ,&nbsp;Michaela Kňažková ,&nbsp;Daniel Nývlt ,&nbsp;Filip Hrbáček","doi":"10.1016/j.catena.2024.108694","DOIUrl":"10.1016/j.catena.2024.108694","url":null,"abstract":"<div><div>Studying permafrost in Antarctica provides insights into climate history, soil and rock structure, and a unique biodiversity with potential impact on ecosystems. Although a great deal of effort has been devoted to the microbiological composition of permafrost soils, the objective pursued in this study is, for the first time, to examine soil and rock samples collected from a 350 cm deep core drilled near the Johann Gregor Mendel Czech Antarctic Station on the Ulu Peninsula of James Ross Island, to study the effect of geochemical properties on microbial composition and diversity and <em>vice versa</em>. We collected samples from the profile starting on the ground surface down to 350 cm depth and correlated information from metagenomic 16S rRNA gene analysis and geochemical data. The 80-cm-thick active layer had a distinct bacterial composition different from the <em>Pseudomonadota</em>-rich permafrost layer, with <em>Actinomycetota</em>, <em>Acidobacteriota</em>, <em>Chloroflexota</em>, and <em>Verrucomicrobiota</em> being the prevalent phyla. Throughout the core, the higher bacterial diversity was positively associated with the sand fraction and intensive weathering. The highest identified diversity in the deepest part of the active layer (transient active layer) suggests that the bacteria here have been gradually cryopreserved, possibly accumulating from the upper layers. In summary, the identified interface between the active layer and permafrost, as well as the transition within the permafrost from Holocene marine sediments to underlying Cretaceous sedimentary rocks (deeper than ∼ 260 cm), had the greatest influence on the bacterial composition. Decadal records of soil temperature and active layer thickness predict more significant interactions in the future between bacterial communities in the current active layer and mineral weathering bacteria that are typical of permafrost.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108694"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms of hydraulic erosion control in different microrelief patterns of loess sloped farmland under continuous rainfall","authors":"Xinkai Zhao ,&nbsp;Xiaoyu Song ,&nbsp;Danyang Wang ,&nbsp;Lanjun Li ,&nbsp;Pengfei Meng ,&nbsp;Chong Fu ,&nbsp;Long Wang ,&nbsp;Wanyin Wei ,&nbsp;Yu Liu ,&nbsp;Huaiyou Li","doi":"10.1016/j.catena.2024.108630","DOIUrl":"10.1016/j.catena.2024.108630","url":null,"abstract":"<div><div>Different microrelief patterns of sloped farmland have important effects on soil erosion. However, its hydraulic erosion control mechanism under continuous rainfall is unclear. In this study, the effects of two microrelief patterns (reservoir tillage (RT) and contour tillage (CT)) of sloped farmland on runoff, soil erosion, and hydrodynamic parameters were investigated at the plot scale using simulated rainfall and high-definition photography methods. Smooth slopes (SS) were chosen as a control. The test rainfall intensities (<em>RI</em>s) were selected as 30, 60, 90, and 120 mm h⁻¹. Two continuous rainfall events, each lasting 40 min, were conducted on each type of slope. The results show that the different microrelief patterns have a twofold role in soil erosion on slopes as influenced by rainfall conditions. During the first rainfall, compared to SS, the RT and CT increased the Darcy–Weisbach coefficient and reduced the surface flow velocity. The RT and CT significantly increased the initial runoff time and reduced runoff yield (10.9–69.46 %) and sediment yield (9.87–74.87 %). However, during the second rainfall event, the water-retaining terrain of the RT and CT was destroyed. This resulted in reduced Darcy–Weisbach coefficients and increased flow velocities on the RT and CT. Compared to the SS, the RT reduced the runoff yield (10.59–63.86 %) and sediment yield (19.04–51.17 %) under <em>RI</em>s of 30, 60, and 90mm h⁻¹, but the magnitude of reduction decreased compared to the first rainfall event. The RT increased the runoff yield (11.32 %) and sediment yield (6.08 %) under the <em>RI</em> of 120 mm h⁻¹. The CT increased the runoff yield (19.13–24.88 %) and sediment yield (15.75–46.32 %) under all four <em>RI</em>s. In addition, statistical analysis indicated that stream power could explain 79 % of the changes in runoff and sediment yield on RT and CT, and effective stream power could account for 79 % of the variations in runoff and sediment yield on SS. Stream power served as the optimal indicator for characterizing the runoff and sediment yield rates on RT and CT, whereas effective stream power was the best metric for SS. This study can help us to better explain the mechanism of hydraulic erosion control in different microrelief patterns.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108630"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological characteristics and influencing factors of gully headwall scour holes in Yuanmou Dry-hot Valley region, Southwestern China","authors":"Baojun Zhang ,&nbsp;Xin Zhao ,&nbsp;Yifan Dong ,&nbsp;Donghong Xiong ,&nbsp;Xinyue Li","doi":"10.1016/j.catena.2025.108721","DOIUrl":"10.1016/j.catena.2025.108721","url":null,"abstract":"<div><div>Scour holes commonly form on gully headcut walls and their induced overhanging mass failures are critical factors in headcut retreat in the Yuanmou Dry-hot Valley region of Southwestern China, where soils exhibit a distinctly layered stratigraphy. However, in this area, the common morphology and the predominant influencing factors of headwall scour holes remain unclear under natural conditions. Therefore, a field survey was conducted to investigate the morphological characteristics of the headwall scour holes under 17 natural gully headcuts and to identify the dominant influencing factors in the region. Seven morphological parameters of headwall scour holes and three categories of potential influencing factors (i.e., upstream terrain, gully-head morphology, soil stratification and properties) were investigated. It was found that scour holes develop with a constant similar geometry on the active gully headcut walls in this area, and their shape in all cases is an irregular semi-ellipsoid. The maximum width, depth and height of all headwall scour holes correlated significantly. Soils exhibited distinct stratification and the properties of each soil layer varied notably. The top dry-red soil layer had significantly higher levels of organic matter content, cation exchange capacity, iron content, aggregate stability and soil cohesion than the underlying layers, suggesting a much greater resistance to erosion. Although the differences in the layer properties promoted the development of scour holes on the gully headcut walls, their size was primarily influenced by the upstream terrain and gully-head morphology, which reflected erosive forces. Specifically, 70.32–90.67% variation in upstream drainage area and gully headcut height was found to significantly contribute to the overall variation in the headwall scour hole morphology. These findings have important implications for the modeling and management of the gully headcut erosion process, particularly in regions with stratified soils as in the Yuanmou Dry-hot Valley region.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108721"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of water diversion practices on spatiotemporal changes in hydrologic and hydrochemical landscapes of surface and groundwater","authors":"Ling Xiong ,&nbsp;Ala Aldahan ,&nbsp;Peng He ,&nbsp;Xiang Lu ,&nbsp;Yuan Ji ,&nbsp;Peng Yi ,&nbsp;Kai Li ,&nbsp;Xuegao Chen","doi":"10.1016/j.catena.2024.108661","DOIUrl":"10.1016/j.catena.2024.108661","url":null,"abstract":"<div><div>Water diversion activities in lakes and the associated hydrological landscape ’diverted rivers/estuaries’ alter the lake’s spatiotemporal dynamics of hydro-environmental characteristics. However, only a few studies have focused on these complex effects in large lakes. We report here the results of an investigation conducted on the natural river estuary, diverted river estuary, and unchannelized lakeshore (blank control) within Hongze Lake. This lake is the largest on the eastern route of the South-to-North Water Diversion Project in China. Stable isotopes (δ¹⁸O, δ²H), major ions (Na, Mg, K, Ca, HCO₃, SO₄, Cl), trace elements (Sr, Pb, Al, Zn, Cu, As, F), and nutrients (NO₃, TP) of the lake water and shallow and deep groundwater were analyzed for samples taken during the water diversion and drainage periods. The data indicate that water diversion and drainage activities accelerate the infiltration and recharge of lake water, involving dilution and enrichment of major ions in groundwater, respectively. However, the diverted river landscape induces the contribution of hydrology and hydrochemistry from deep groundwater to lake water and shallow aquifers during water diversion activities. The impact of these processes persists for approximately a month after the end of the water diversion period. Additionally, increased water temperature and acidity during the water diversion period release more trace elements from sediment into the lake and shallow groundwater. This process also enriches nutrient concentrations in the lake water. The results and the proposed model provide insights for the management of water quantity and quality during the implementation of water diversion practices in lake systems.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"249 ","pages":"Article 108661"},"PeriodicalIF":5.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}