Journal of Soils and Sediments最新文献

{"title":"Enhancing soil particle content prediction accuracy: advanced hyperspectral analysis and machine learning models","authors":"Xiao Wang, Jianli Ding, Lijing Han, Jiao Tan, Xiangyu Ge","doi":"10.1007/s11368-024-03886-8","DOIUrl":"https://doi.org/10.1007/s11368-024-03886-8","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Prediction of soil particle content is essential for soil texture classification, soil management and agricultural production. This study aimed to achieve high-accuracy predictions of soil particle content in the Ogan-Kucha River Oasis using hyperspectral data and environmental variables.</p><h3 data-test=\"abstract-sub-heading\">Materials and methods</h3><p>We collected 62 representative surface soil samples (depth: 0–10 cm), and conducting indoor soil particle content and spectral measurements. The relationship between environmental variables and soil particle content was analyzed using the Boruta algorithm, and seven three-band spectral indices (TBIs) were constructed using an optimal band algorithm. By integrating environmental covariates and TBIs, soil particle inversion models were developed using the extreme learning machine (ELM), backpropagation neural networks (BP), neural networks optimized with the sparrow search algorithm (SSA-BP), and neural networks optimized with the sparrow search algorithm enhanced by Sine chaos mapping (Sine-SSA-BP).</p><h3 data-test=\"abstract-sub-heading\">Results and discussion</h3><p>The results demonstrated that (1) the Boruta algorithm identified key environmental covariates that affect specific soil particle components; (2) there was significant variation in the correlation between different TBIs and soil particle content, with absolute correlation coefficients ranging from 0.225 to 0.852; (3) the estimation models established by the four machine learning algorithms performed well in predicting soil particle content, particularly for silt (<i>R</i>^<i>2</i>: 0.664–0.858, RMSE: 11.107–17.128) and clay (<i>R</i>^<i>2</i>: 0.444–0.857, RMSE: 0.550–1.405), for which higher accuracy was achieved; and (4) compared with the traditional ELM (<i>R</i>^<i>2</i>: 0.422–0.664), BP (<i>R</i>^<i>2</i>: 0.487–0.673) and SSA-BP models (<i>R</i>^<i>2</i>: 0.625–0.777), the Sine-SSA-BP model showed a significant improvement in prediction accuracy, with the highest <i>R</i>^<i>2</i> reaching 0.858.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>Compared to the traditional ELM, BP and SSA-BP models, the Sine-SSA-BP model significantly excelled in predicting soil particle content, offering innovative insights and robust support for soil texture classification and management.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"78 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polylactic acid microplastics and polyhydroxyalkanoate microplastics affect cadmium mobility by regulating sediment geochemical properties","authors":"Wang Li, Hanwen Huangdeng, Xiaofei Zhao, Bo Zu, Jiawen Li","doi":"10.1007/s11368-024-03889-5","DOIUrl":"https://doi.org/10.1007/s11368-024-03889-5","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Microplastics may affect the bioavailability of heavy metals in sediments primarily through direct adsorption. However, the potential of microplastics to alter the distribution of heavy metal chemical forms by interfering with the geochemical properties of sediments which may indirectly affect the bioavailability of heavy metals, has been overlooked. This study investigated the impact of two widely used biodegradable microplastics, polylactic acid (PLA) and polyhydroxyalkanoate (PHA), on the distribution of cadmium (Cd²⁺) in cadmium-contaminated sediments.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Varying concentrations and particle sizes of PLA and PHA were added to Cd-pre-contaminated sediment and incubated under simulated submersion conditions for 60 days. The distribution of Cd²⁺ fraction in the sediment was determined, and the influence of biodegradable microplastics on cadmium mobility, through the regulation of sediment geochemical properties, was assessed.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Compared to the control group, the pH value and organic matter content of sediments treated with biodegradable microplastics significantly decreased, which in turn caused a transformation in the chemical form of cadmium. Higher concentrations and smaller particle sizes significantly promote a shift in cadmium components toward acid-soluble forms, thereby enhancing the mobility of cadmium in sediments, thereby amplifying its environmental toxicity.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>These results emphasize the potential of biodegradable microplastics to indirectly affect the mobility of cadmium by regulating sediment geochemical properties.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"61 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biocementation for desert sand against wind-induced erosion with different treatment processes","authors":"Yang Liu, Yaqing Gao, Bin Liu, Xinwen Cao, Jiawei Chen","doi":"10.1007/s11368-024-03888-6","DOIUrl":"https://doi.org/10.1007/s11368-024-03888-6","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Wind-induced erosion is a serious problem that yields soil degradation and environmental pollution. Biocementation technologies have shown potential for sand fixation and wind erosion control in deserts and arid regions. The topic of this study is to investigate the effectiveness of biocementation against wind-induced erosion with different treatment processes.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Biocementation was achieved through soybean-urease induced calcium carbonate precipitation. Three different volumes of treatment solution were used to treat sand specimens by spraying, mixing and the combination methods in this study. The characteristics of sprayed and mixed crust were shown, and the properties of all the biotreated specimens including CaCO₃ distribution, wind erosion rate, and penetration resistance were measured.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The carbonate content in the soil increased with the amount of treatment solution. At the same dosage, the spraying method concentrated 1.0%-1.4% CaCO₃ in the surface soil, while the mixing method generated 0.8% CaCO₃ in a uniform spatial distribution. The top-concentrated CaCO₃ resulted in a lower initial wind erosion rate of the sprayed specimen. The overall reinforcement of the soil by the mixing method produced higher penetration resistance and inhibited the development of wind erosion. The combination of the two methods increased penetration resistance to 200 N and reduced the wind erosion rate to almost 0 g·m⁻²·min⁻¹.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>The spraying and mixing methods induced different distribution patterns of CaCO₃ precipitations in soil, leading to varying biocementation effectiveness. To resist severe and continuous wind-induced erosion, a combination of the two methods can be considered to improve the uniformity and strength of biocementation within a certain depth of the soil.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"63 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparison of phytolith assemblages in surface soils along the 400-mm and 600-mm mean annual precipitation isohyets in Northeast China","authors":"Hongyan Liu, Dongmei Jie, Lidan Liu, Guizai Gao, Dehui Li, Nannan Li","doi":"10.1007/s11368-024-03879-7","DOIUrl":"https://doi.org/10.1007/s11368-024-03879-7","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>A prerequisite for the successful application of phytoliths in paleoenvironmental reconstruction is the correct interpretation of their environmental significance. In this context, key questions include: What magnitude of temperature/precipitation change is required to effect significant changes in surface soil phytolith percentages? When temperature/precipitation increases by a certain amount, what is the corresponding response of the percentages and assemblages of surface soil phytoliths? Additional detailed research is required to answer these questions.</p><h3 data-test=\"abstract-sub-heading\">Materials and methods</h3><p>We analyzed the phytoliths in 90 surface soil samples collected along the isohyets corresponding to the mean annual precipitation (MAP) of 400 mm (with the mean annual temperature (MAT) range of 3.24℃) and 600 mm (with the MAT range of 8.29℃) in Northeast China. Our objective was to determine the response of phytoliths to different temperature gradients. Soil phytoliths were extracted and identified using heavy liquid separation and microscope observations.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The DA of the phytolith percentages enabled the separation of samples collected along the two isohyets, with a total accuracy of 94.44%. MAT was the principal factor affecting the spatial distribution of phytoliths, with an explanation rate of 46.40%. In the surface soil samples collected along the two isohyets, the percentages of ELONGATE, ACUTE BULBOSUS, and PTERIDOPHYTE-TYPE morphotypes, were significantly negatively correlated with MAT, while the percentages of SQUARE were significantly positively correlated with MAT. However, the relationship between PAPILLATE percentages and MAT varied, showing both positive and negative correlations. A temperature gradient of ~ 3℃ was insufficient to significantly affect the percentages of SADDLE, BULLIFORM FLABELLATE, and BILOBATE. The phytolith index (C/W) can be effectively used to reconstruct the palaeoclimate in Northeast China. An MAP change of 200 mm resulted in significant changes in the percentages of ELONGATE, SADDLE, BULLIFORM FLABELLATE, and TRACHEARY (with the respective rates of 39.57%, 780.77%, 179.00% and 81.25%). However, the percentages of ACUTE BULBOSUS, SQUARE, RONDEL, BILOBATE, CRENATE, PTERIDOPHYTE-TYPE, SILICIFIED STOMATA, and PAPILLATE did not change significantly.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Our results contribute to an improved understanding of the response of various phytolith morphotypes to temperature, and they provide a modern process basis for future phytolith-based paleoclimatic reconstruction in this region.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"25 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stabilization of river dredged sediments by means of alkali activation technology","authors":"Karmen Fifer Bizjak, Lea Žibret, Mojca Božič, Boštjan Gregorc, Vilma Ducman","doi":"10.1007/s11368-024-03872-0","DOIUrl":"https://doi.org/10.1007/s11368-024-03872-0","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Alkali activation process has been applied to fresh river clay-rich sediments in order to increase their mechanical properties and make them suitable for soil stabilization.</p><h3 data-test=\"abstract-sub-heading\">Materials and methods</h3><p>Dredged sediments were mixed with up to 30 mass percent (ma%) of fly ash (FA) or ladle slag (LS) and after curing for 3 days at 60 °C, the bending and compressive strength have been determined. The mixtures which exhibited the highest strengths were further optimized for being used in soil stabilization. For this purpose, the sediment was stabilized with 4 ma% of quicklime (QL) and after 1 h 30 ma% of FA with alkali activator was added and cured for 1, 7 and 28 days.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The stabilized sediment has a significantely better geomechanical performance in comparison with the sediment alone. Stabilizing the dredged sediment using alkali activation technology provides high enough strengths to eventually make it suitable for anti-flood embankments.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>The results confirmed the suitability of the investigated technology for soil stabilization.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"147 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxic potential of the soil from sites with mining waste in San Luis Potosí, Mexico","authors":"Romy Patricia Díaz-Pérez, Eleno Uriel Sanjuan-Meza, José de Jesús Mejía-Saavedra, César Arturo Ilizaliturri-Hernández, Israel Razo-Soto, Alejandra Abigail Berumen-Rodríguez, Guillermo Espinosa-Reyes","doi":"10.1007/s11368-024-03884-w","DOIUrl":"https://doi.org/10.1007/s11368-024-03884-w","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>The aim of this study was to evaluate the toxic potential of mining residues by 1) evaluating the concentrations of heavy metals and arsenic in soil and earthworm’s samples from impacted and reference sites in Charcas and Villa de la Paz, San Luis Potosí, México; and 2) evaluating effects by laboratory bioassays and the comet assay in the earthworm <i>Eisenia andrei</i>.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>The quantification of metals in soils was carried out by the Thermo Scientific Niton XL3t Gold Serie 500 environmental analyzer for X-ray fluorescence (XRF), and in the earthworm tissue through ICP-MS. The evaluation of the genotoxic potential of soils was assessed through movility and exposure bioassays with earthworms, determining DNA damage using the comet assay at the end of the bioassays.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>In Charcas, the concentrations in soils of heavy metals from highest to lowest were: Pb &gt; Cu &gt; Mn &gt; Cd (Impacted); and Mn &gt; Pb (Reference). In Villa de la Paz, the concentrations were: As &gt; Mn &gt; Cu &gt; Pb (Impacted) and Mn &gt; Pb &gt; As (Reference). The exposure pattern to heavy metals in earthworms in Charcas was: Pb &gt; As (Impacted and Reference); and in Villa de la Paz it was: As &gt; Mn &gt; Pb &gt; Cu &gt; Cd (Impacted), y Pb &gt; As (Reference). In both mining districts, the magnitude of DNA damage in earthworms was: Impacted &gt; Reference &gt; Control.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>The results indicate that the impacted soils of both sites represent a significant source of exposure to edaphic organisms, with a notable genotoxic potential.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"52 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manure and its biochar affect activities and stoichiometry of soil extracellular enzymes in croplands","authors":"Zhengfeng An, Cole D. Gross, Xinli Chen, Edward W. Bork, Cameron N. Carlyle, Scott X. Chang","doi":"10.1007/s11368-024-03887-7","DOIUrl":"https://doi.org/10.1007/s11368-024-03887-7","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>The influence of organic amendments on the interplay among soil extracellular enzyme activities (EEAs) and their stoichiometry (EES) and nutrient availabilities, key indicators of resource limitations for soil microbes, is poorly understood. This study aims to investigate how manure compost (hereafter “manure”) and its biochar derivative affect EEAs, EES and soil fertility.</p><h3 data-test=\"abstract-sub-heading\">Materials and methods</h3><p>We studied EEAs (BG, β-glucosidase; CBH, cellobiohydrolase; LAP, Leucine aminopeptidase; NAG, β-1,4-N-acetylglucosaminidase and AP, acid phosphatase), EES and soil fertility two years post-application of manure and biochar in central Alberta, Canada.</p><h3 data-test=\"abstract-sub-heading\">Results and discussion</h3><p>Applying manure and its biochar did not affect soil permanganate oxidable carbon (C), total phosphorus (P), and available P and nitroegn (N). Manure application increased NAG activity by 13.9% (75.9 nmol h⁻¹ g⁻¹ soil) relative to the control (66.6 nmol h⁻¹ g⁻¹ soil), whereas biochar application increased LAP activity by 22.1% (64.6 nmol h⁻¹ g⁻¹ soil) compared to the manure treatment (52.9 nmol h⁻¹ g⁻¹ soil), suggesting that manure addition caused microbial C limitation, while biochar addition led to microbial N limitation. However, both manure and biochar treatments did not affect soil NAG, CBH and AP, and enzymatic C:N, C:P, and N:P stoichiometry. Manure and biochar and their interactions with the soil ultimately affect soil physicochemical properties.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Manure and its biochar differentially altered some soil N-cycling EEAs and C and N limitations two years after their applications.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"52 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying pesticide-contaminated sediment sources in tropical coastal environments (Galion Bay, French West Indies)","authors":"Rémi Bizeul, Olivier Cerdan, Lai Ting Pak, Laurence Le Callonec, Sylvain Huon, Pierre Sabatier, Olivier Evrard","doi":"10.1007/s11368-024-03883-x","DOIUrl":"https://doi.org/10.1007/s11368-024-03883-x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Over the last 60 years, intensification of soil cultivation led to an acceleration of soil erosion and sediment delivery to river systems. In Martinique, this acceleration has led to the remobilization of a toxic insecticide (i.e. chlordecone) used in the 1970s-1990s to control banana weevil. A previous study attributed this accelerated remobilization to the application of glyphosate in plantations from the 1990s onwards. To further unambiguously confirm this link, the identification of soil erosion sources supplied to coastal sediment is essential.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Accordingly, sediment fingerprinting tools were adapted and applied to a coastal sediment core collected in the Galion Bay. Potential source samples (n=37) were collected across the drainage area. Along with the coastal sediment core layers, these samples were analysed for potential tracing properties. The optimal suite of tracers was then selected and introduced into an un-mixing model to quantify their contributions to coastal sediment.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Results showed that subsoil (i.e. soil layer <span>(&lt; 30)</span> cm depth) and banana plantation soil surface supply the major sources of sediment (49-78% and 12-36%, respectively) to the Galion Bay and that their contributions increased since 2000, in line with chlordecone and glyphosate fluxes.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>This evolution may be attributed to the higher sensitivity of banana plantations to erosion that may have been enhanced by the glyphosate application leaving the soil uncovered with vegetation and to the contamination of both topsoil and deep soil layers (<span>(&lt; 30)</span> cm) layers with chlordecone due to its vertical transfer along the soil profile and its redistribution across hillslopes.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142193370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Post-dredging monitored natural recovery of surface sediments in an urban river","authors":"Kristin Searcy Bell, Katrina Leigh, Rich Galloway, Victor S. Magar","doi":"10.1007/s11368-024-03878-8","DOIUrl":"https://doi.org/10.1007/s11368-024-03878-8","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Verification monitoring was performed over five years following the sediment remediation of the Buffalo River Area of Concern (AOC), New York, USA. Monitoring results were compared with surface sediment cleanup goals to determine whether natural sedimentation allowed the AOC to achieve long-term remedial goals without the placement of cover material to manage dredge residuals.</p><h3 data-test=\"abstract-sub-heading\">Material and methods</h3><p>Monitoring was conducted two years and five years following sediment remediation and included: 1) bathymetric surveys to understand sediment stability and deposition rates, and 2) the analysis of surface sediment samples for four primary chemicals of concern (COCs), including polyaromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), lead, and mercury, to compare surface sediment concentrations over time with site-specific sediment remedial goals.</p><h3 data-test=\"abstract-sub-heading\">Results and discussion</h3><p>The monitoring results demonstrated the following: 1) sedimentation is occurring, 2) a stable depositional environment is present throughout the Buffalo River AOC, and 3) measurable reductions in sediment concentrations were observed for PAHs, PCBs, lead and mercury in the newly deposited sediment. By Year 5, surface sediment chemistry results generally achieved the remedial goals throughout the Buffalo River AOC.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>Monitored natural recovery (MNR) was effective in physically isolating dredge residuals in the Buffalo River AOC, following sediment removal. This post-dredging MNR approach met the surface sediment remedial goals in most areas, resulted in a protective and cost-effective project by not requiring the placement of clean cover material in the dredge areas, and was an environmentally sustainable strategy by eliminating the need to collect, transport, and place millions of kilograms of clean quarried material in the river.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"2 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Agitation dredging of silt and fine sand with Water Injection Dredging, Tiamat and Underwater Plough: a case study in the Port of Rotterdam","authors":"Sterre Neumann, Alex Kirichek, Andre van Hassent","doi":"10.1007/s11368-024-03877-9","DOIUrl":"https://doi.org/10.1007/s11368-024-03877-9","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Purpose</h3><p>Agitation dredging has gained popularity as an environmentally friendly and cost-effective method for port maintenance. One of the advantages of agitation dredging is the ability to transport sediments out of the port area using natural currents. The effect of the different agitation methods on sediment and water properties has rarely been investigated in a single pilot project. This research aims to study the effects of agitation methods in silt and sand-dominated areas that are frequently maintained.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>The effects of water injection dredging, (WID) underwater ploughing (UWP) and Tiamat on sediment properties are investigated in the Port of Rotterdam. In-situ measurements and laboratory measurements are carried out to determine changes in the bed level, the particle size distribution of the bed, the turbidity in the water column and the dispersion distance of the sediment plume due to agitation dredging.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The results of the in-situ monitoring of the agitation pilots allow a comparison of the changes in sediment and water properties before, during and after agitation dredging. The production, advantages and limitations of the tested agitation dredging methods are discussed.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>The in-situ measurements show that WID, Tiamat and UWP can be successfully used for the agitation of sediments and their removal from the silt and sand-dominated areas. The production of the tested agitation methods is higher for silty than sandy sediments. In general, the selection of the agitation equipment can be made based on environmental regulations, sediment properties and hydrodynamic conditions.</p>","PeriodicalId":17139,"journal":{"name":"Journal of Soils and Sediments","volume":"8 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}