International Journal of Sediment Research最新文献

{"title":"Rapid magnetic susceptibility measurement as a tracer to assess the erosion–deposition process using tillage homogenization and simple proportional models: A case study in northern of Morocco","authors":"Abdessalam Ouallali ,&nbsp;Naima Bouhsane ,&nbsp;Saidati Bouhlassa ,&nbsp;Mohamed Moukhchane ,&nbsp;Shamsollah Ayoubi ,&nbsp;Habiba Aassoumi","doi":"10.1016/j.ijsrc.2023.06.002","DOIUrl":"10.1016/j.ijsrc.2023.06.002","url":null,"abstract":"<div><p><span>Soil erosion<span><span> is a significant threat in the Rif region in northern Morocco. Hence, accurate cartography of the phenomenon, magnitude, and extent of erosion in the area needs a simple, rapid, and economical method such as </span>magnetic susceptibility (MS). The current study aims to: (i) determine the factors influencing the variation of soil MS, (ii) exploit MS to estimate soil loss using two approaches in different homogenous units characterized by the same climatic conditions with different edaphic characteristics (land use, slope, and lithology), and (iii) highlight the potential for using MS as a cheap and rapid tracer of a long term erosion and deposition processes. Mass-specific magnetic susceptibility at low (</span></span><em>χ</em>_lf) and high (<em>χ</em>_hf) frequencies were measured for 182 soil samples collected in the study area. A tillage homogenization (T-H) model and a simple proportional model (SPM) were applied on an undisturbed soil profile to predict the eroded soil depths for given cores. The results confirm that <em>χ</em>_lf<span><span> is influenced by land use, slope, and soil type. Pedogenesis is the main factor affecting soil MS enhancement, indicated by homogenous magnetic </span>mineralogy with a dominance of super-paramagnetic (SP) and stable single domain (SSD) magnetic grains. The study results show that higher soil losses have occurred in almost all the soil samples when applying the T-H model compared to application of the SPM. The SPM underestimates erosion due to its ignorance of the MS of the plow layers after erosion. The current study implies the high efficacy of magnetic susceptibility as the quick, easily measurable, simple, and cost-effective approach that can be used as an alternative technique for evaluating soil redistribution.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43490135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of sediment transport in partially ice-covered channels","authors":"Mina Rouzegar,&nbsp;Shawn P. Clark","doi":"10.1016/j.ijsrc.2023.06.003","DOIUrl":"10.1016/j.ijsrc.2023.06.003","url":null,"abstract":"<div><p><span>It is important to understand the effects of ice cover on sediment transport in cold climates, where sub-freezing temperatures affect water bodies for a significant part of the year. The literature contains many studies on sediment transport in </span>open channel flow<span>, and several studies on sediment transport in completely ice-covered flow. There has been little or no research on sediment transport in partially ice-covered channels. In the current study, laboratory experiments were done in a rectangular flume to quantify the impact of border ice presence on the sediment transport rate. The effects of ice cover extent and changing flow strengths on sediment transport distribution also were investigated, and the results were compared to those for fully ice-covered and open channel flow. The ice coverage ratios considered were 0 (representing the open water condition), 0.25, 0.50, 0.67, and 1 (representing fully ice-covered flow). The partial ice cover was found to impact the sediment transport distribution within the channel. The effect of ice coverage extent on sediment transport distribution was more significant at lower flow strengths and became negligible at higher flow strengths. The conventional equations for sediment transport in open channel flow and fully ice-covered flow that relate the dimensionless bedload transport rate to the flow strength were found to be applicable to estimate the total cross-section-averaged bedload transport for partially ice-covered flow when modified appropriately. Empirical coefficients for these equations were determined using the experimental data.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44615853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling uncertainties of reservoir flushing simulations","authors":"Camila Bergmann Goulart ,&nbsp;Tobias Bleninger ,&nbsp;Hugo de Oliveira Fagundes ,&nbsp;Fernando Mainardi Fan","doi":"10.1016/j.ijsrc.2023.04.005","DOIUrl":"10.1016/j.ijsrc.2023.04.005","url":null,"abstract":"<div><p>Every dam or barrage construction affects the watercourse and the retention of sediment that previously was carried by the river, which can lead to siltation<span> of the reservoir and obstruction of water intakes over time, reducing their capacities. However, the information available regarding the effect of sediment and drawdown parameters, sediment management at reservoirs, as well as different equational approaches, is scarce. The current research aims to evaluate the effect of parameters associated with numerical modeling of sediment management in reservoirs considering scenarios with different drawdowns, transport equations, sediment size distributions, and thickness of the initial sediment layer. The case study of the Aimorés Hydropower Plant (HPP) is used, applying the Delft3D-FLOW model for two-dimensional modeling. All parameters influenced the volume of mobilized sediment, among which the initial layer thickness was the parameter that resulted in the greatest changes in simulated results. In general, the results show that the uncertainties in the input parameters outweigh the uncertainties between the techniques, which found large variations in results when evaluating the use of different transport equations. These results indicate the importance of proper estimation of model parameters for predicting effects with accuracy and the need for such studies before planning and management operations are evaluated to avoid environmental harm and energy waste.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47447407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving hydrodynamic modeling of river networks by incorporating data assimilation using a particle filter","authors":"Chenhui Jiang ,&nbsp;Dejun Zhu ,&nbsp;Haobo Li ,&nbsp;Xiaoqun Liu ,&nbsp;Danxun Li","doi":"10.1016/j.ijsrc.2023.06.001","DOIUrl":"10.1016/j.ijsrc.2023.06.001","url":null,"abstract":"<div><p><span>Numerical modeling is a well-recognized method for studying the hydrodynamic processes in river networks. Multi-source measurements also offer abundant information on the patterns and mechanisms within the processes. Therefore, improving hydrodynamic modeling of river networks through the use of </span>data assimilation techniques has become a hot research topic in recent years. The particle filter (PF) is a commonly used data assimilation method and has been proven to be applicable to various nonlinear and non-Gaussian models. In the current study, an improved numerical hydrodynamic model for large-scale river networks is established by incorporating the advanced PF algorithm. Furthermore, the PF method based on the Gaussian likelihood function (GLF) and the method based on the Cauchy likelihood function (CLF) are compared for a complex river network scenario. The feasibility of the PF-based methods was evaluated through application to the Yangtze-Dongting River-lake Network (YDRN) by assimilating water stage data collected at six hydrometric stations during the entire hydrodynamic process in 2003. Additionally, the parameters used in the likelihood function, which affect the assimilation performance, also were explored in the current study. The study results found that the accuracy of the model-derived water stage data was improved when the PF-based methods are utilized, with improvement not only at the data assimilation (calibration) sites but also at three hydrometric stations not used in the data assimilation (i.e., verification sites). The highest average Nash-Sutcliffe Efficiency result for the six assimilation sites were 0.98 while the lowest summed root-mean-square-error result was 1.801 m. The comparison results also indicated that the CLF-based PF outperformed the GLF-based PF when high-accuracy observed data are available. Specifically, the CLF can effectively resolve the filtering failure problem and the dispersion problem of PFs, and further improve the accuracy of the filtering results for a river network scenario. In summary, the CLF-based PF method along with high-accuracy observation data shows promise to provide reliable reference and technical support for hydrodynamic modeling of large-scale river networks.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45891725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sand wave migration near the southeastern corner of Martha's Vineyard, Massachusetts, USA","authors":"Vinícius Santos Pessanha ,&nbsp;Peter Cheng Chu ,&nbsp;Matthew Kenneth Gough ,&nbsp;Peter Traykovski ,&nbsp;Mara Morgenstern Orescanin","doi":"10.1016/j.ijsrc.2023.04.006","DOIUrl":"10.1016/j.ijsrc.2023.04.006","url":null,"abstract":"<div><p>Sand waves of approximately 2 m in height were observed to migrate nearly 40 m with counterclockwise rotation between two bathymetric surveys<span><span> performed three months apart near the southeastern corner of Martha's Vineyard, Massachusetts. The region is characterized by strong tidal currents, intermittent energetic surface wave events, and shallow water with local depth ranging from 2 to 7 m. This study uses the process-based model, Delft3D, with a three-dimensional approach to examine the sand wave dynamics by incorporating surface waves, winds, currents, and bathymetric observations. The model successfully simulates sand wave migration in comparisons to observations. Model sensitivity analyses show that the sand wave migration reduces by 65% with the absence of the surface waves. The modeled sand wave migration speed is correlated with the tidal current Shields parameter, and sharp increases in migration speed occur when the wave-driven Shields parameter increases in response to energetic surface wave events. The combined effect of tides, surface waves, and </span>bathymetry is the origin of the rotational aspect of the sand wave, using the Shields parameter as an indicator of tidal currents and surface wave influence on sand wave dynamics.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47500795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagenetic signatures in the deltaic and fluvial-estuarine Messinian sandstone reservoirs in the Nile Delta as a tool for high-resolution stratigraphic correlations","authors":"Mahmoud Leila ,&nbsp;Andrea Moscariello ,&nbsp;Dustin Sweet ,&nbsp;Branimir Šegvić","doi":"10.1016/j.ijsrc.2023.05.002","DOIUrl":"10.1016/j.ijsrc.2023.05.002","url":null,"abstract":"<div><p><span>The current study utilizes a range of diagenetic fingerprints to differentiate between sandstone facies deposited in the Nile Delta before and during the Messinian<span><span><span> salinity<span> crisis (MSC), which is normally a challenging task considering the complex bio- and lithostratigraphic subdivisions of Messinian rock units. Subaerial exposure of the pre-MSC (Qawasim deltaic sandstone), during drawdown of the Mediterranean Sea at the time of the MSC, triggered pervasive dissolution of unstable rock fragments, kaolinization of feldspar, and meteoric </span></span>dolomitization of carbonate. This was followed by mesogenetic </span>calcite<span><span> cementation and </span>kaolinite<span> transformation into dickite<span> in deeply buried Qawasim sandstone. Comparatively, the Abu Madi estuarine facies, deposited during transgression after drawdown related to the MSC, is characterized by eogenetic iron (Fe)-calcite, glauconite<span>, and pyrite (averages of 14.5%, 6%, and 2%, respectively). This facies transition is marked by abundance of mature glauconite (with potassium oxide (K</span></span></span></span></span></span>₂<span>O) at about 8%) whose content abates upward from the transgression surface. Moreover, the compositional variability of the Abu Madi sandstone gave rise to multiple diagenetic trajectories that resulted in chlorite formation presumably following smectite<span> and kaolinite. Listed diagenetic variations in the studied Messinian sandstone resulted from a complex interplay between rocks’ compositional, depositional, and burial attributes, ultimately serving as a basis for high-resolution stratigraphic correlation in continental and marginal marine settings with poor biostratigraphic controls.</span></span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41682740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of gravitational sedimentation of flexible, permeable circular and planktonic particle applying the immersed boundary method","authors":"Rekha Panghal,&nbsp;Sudeshna Ghosh","doi":"10.1016/j.ijsrc.2023.05.004","DOIUrl":"10.1016/j.ijsrc.2023.05.004","url":null,"abstract":"<div><p>The gravitational settling of a flexible, permeable circular and planktonic particle drenched in a fluid which is assumed to be Newtonian and incompressible along with being viscous was studied. A mathematical formulation and numerical simulations of the studied problem were done by applying the Immersed Boundary Method (IBM) in a two-dimensional fluid domain. Parametric studies were done for analyzing the impact of varying flexibilities and permeabilities with reference to settling velocity<span> (terminal velocity) and shape deformation of the particle. The terminal velocity and permeability of the particle are directly proportional. It was observed that for fixed permeability, the terminal velocity increases when increasing the flexibility of the particle.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41298179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Establishment and development of the World Association for Sedimentation and Erosion Research","authors":"Cheng Liu ,&nbsp;Zhaoyin Wang ,&nbsp;Des E. Walling","doi":"10.1016/j.ijsrc.2023.09.003","DOIUrl":"https://doi.org/10.1016/j.ijsrc.2023.09.003","url":null,"abstract":"<div><p><span>Problems of soil erosion<span><span> and sedimentation are issues of global concern. With the intensification of global change and the impacts of human activities, many countries are facing severe challenges from wide-ranging sediment-related problems. The prevention and control of sediment disasters and the rational use of soil and sediment resources are important requirements for the sustainable development strategies of all countries. As sediment problems are closely related to social, economic, and other human activities, the effective solution of sediment problems requires the concerted efforts of experts in different fields and thus an interdisciplinary approach is essential. In view of the increasing recognition of sediment as a topic of global significance and the need to promote interdisciplinary research in this field, the World Association for Sedimentation and Erosion Research (WASER) was inaugurated in 2004. In this paper the history of the establishment of WASER is reviewed and its main activities are briefly summarized. The series of International Symposia on River Sedimentation (ISRS) has served as the official symposium of WASER since 2004. These triennial technical events have been held in China, Russia, Japan, </span>South Africa, and Germany with about 2,000 participants. In addition to sponsoring the ISRS, WASER has to date also sponsored/organized or co-sponsored/co-organized over 30 other international conferences, workshops, training courses, and study tours besides sponsoring the ISRSs. The adoption of the </span></span><em>International Journal of Sediment Research</em><span> (IJSR) as the official journal of WASER in 2004 has also played an important role in increasing the exposure of the Association. These activities have served to raise WASER's profile as well as promoting collaboration with agencies and other organizations working in the field of erosion and sedimentation. Three types of prizes and honors are awarded by WASER. These include the International Qian Ning Prize for Erosion and Sedimentation Technology, the IJSR Award for Distinguished Contributions to Sediment Research and Honorary Membership. Through its activities, WASER aims to strengthen the development of education and capacity building in the field of sustainable sediment management in global water management, promote sharing of information, on related data, the results of scientific research, and management methods, and advances in the study of erosion and sedimentation.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71782596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study on flocculation and sedimentation characteristics of cohesive fine sediment measured using ultrasound in the Pearl River Estuary","authors":"Qinqin Liu ,&nbsp;Xiaojian Liu ,&nbsp;Jian Chen ,&nbsp;Peng Hou ,&nbsp;Yong He ,&nbsp;Qisong Wang ,&nbsp;Xiaowei Zhu ,&nbsp;Qiang Wang ,&nbsp;Huan Gao","doi":"10.1016/j.ijsrc.2023.09.001","DOIUrl":"https://doi.org/10.1016/j.ijsrc.2023.09.001","url":null,"abstract":"<div><p><span>Flocculation-settling of cohesive fine sediment is the main cause of sediment deposition and changes in topography and geomorphology<span> in estuaries. However, studies on estuary morphology have often focused on a single influencing factor, and sediment deposition characteristics under disturbances in sediment concentration, moisture content, and external forces have rarely been considered simultaneously. The authors propose an ultrasound-assisted flocculation-settling method to analyze the various factor affecting cohesive sediment. The current study examined the sedimentation patterns of cohesive sediment with a sediment content concentration of 30%–80% through ultrasound experiments. The results show that when the sediment concentration is 40%–50%, the best effect on flocculation and sedimentation is induced by ultrasound waves. The corresponding settling height at the clear-muddy water interface is 3.05–3.45 cm, and the settling rate is 0.161–0.173 cm/min. Finally, using ultrasound waves, a moisture content of the sediment concentration of 30%–80% was analyzed based on wet and dry conditions. Taking a sediment concentration of 50% as an example, the maximum values of the variation in the water contents of the upper, middle, and lower layers of the wet basis were 0.82%, 0.51%, and 0.37%, respectively, whereas those of the upper, middle, and lower layers of the dry basis were 4.77%, 1.07%, and 0.60%, respectively. Thus, the moisture content of dry and wet sediment varied as follows: </span></span><em>W</em>_upper &gt; <em>W</em>_middle &gt; <em>W</em>_lower<span>. The current research results can provide a theoretical basis and technical reference for siltation in channels, harbors, and reservoirs; the evolution of submarine deltas and coastal beaches; transportation of fluid mud; and the treatment of hyper-concentrated sediment flows.</span></p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71782595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of the micro-interfacial interactions of heterogeneous particulate matter (fine-grained sediment and microplastics) with copper ions","authors":"Jing Ou ,&nbsp;Zhihe Chen ,&nbsp;Tung-Chiung Chang","doi":"10.1016/j.ijsrc.2023.08.006","DOIUrl":"10.1016/j.ijsrc.2023.08.006","url":null,"abstract":"<div><p><span><span>Particulate matter, such as sediment and microplastics (MPs), in aqueous environments has comparable micro-interfacial characteristics. However, the micro-interfacial characteristics of heterogeneous particulate matter are complex and are not fully understood. In this study, micro-interfacial kinetics and the interactions governing copper (Cu) </span>ion adsorption to PP–sediment were investigated using micro-interfacial characterization experiments and kinetic experiments for Cu ion absorption to sediment, polypropylene (PP), and PP–sediment particles. The results show that (1) a pseudo-second-order model can be used to accurately describe the micro-interfacial kinetics of Cu ion adsorption to PP–sediment, indicating that chemical adsorption dominates the process. For Cu, the adsorption capacity, </span><em>q</em>_e<span>, of PP–sediment is approximately 0.4808 mg/g, between that of sediment and PP. (2) Film diffusion is the rate-controlling process in the early adsorption stage. Intraparticle diffusion gradually becomes the controlling process as the film diffusion constant (</span><em>k</em>_fd) decreases and the film diffusion model becomes less applicable, but intraparticle diffusion is weaker in the PP–sediment system than in the sediment-only system. (3) The applicability of the intraparticle diffusion model for Cu ion adsorption to PP–sediment in the later stage of adsorption is between that of the sediment and PP systems. Furthermore, the heterogeneous aggregation of sediment and PP affects the micro-interfacial interactions of both types of particulate matter. The current study contributes to a better understanding of the micro-interfacial interactions of heterogeneous particulate matter (such as fine-grained sediment and MPs) with heavy metal ions in aqueous environments.</p></div>","PeriodicalId":50290,"journal":{"name":"International Journal of Sediment Research","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48570732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}