European Inland Research Articles

Impact of automation and zero-emission propulsion on design of small inland cargo vessels

Abstract Small inland waterways offer considerable capacity for modal shift of cargo transport. Revitalization of smaller inland waterways, however, may require new vessel designs as most of the existing small vessels are outdated and incompatible with the present state of the technology development and the current commercial and regulatory requirements. This paper investigates the possibilities for modernization of small inland vessel designs and offers a systematic analysis of impact of “automation” and “zero-emission propulsion technology” on reference designs of standard European inland cargo vessels of CEMT classes I, II, III, and IV. The adopted level of automation enables the vessels to be remotely operated without human crew onboard, whereas the adopted zero-emission propulsion concept is based on electrification of the powertrain. The paper identifies the impacts of the modernization on general arrangement, cargo capacity, safety, structural design, etc. and indicates the vessel classes which could be the most promising candidates for the design of a future small autonomous inland ships.

Renewable Hydrogen Supply Scenarios for Inland Waterway Transport in Europe

The European inland waterway transport needs to substitute 6.2 TWh of fossil diesel by renewable energy carriers. For hydrogen retrofit solutions investigated in the European project “Synergetics”, different Well-to-Tank pathways have been analysed to supply renewable hydrogen to Rotterdam, including buffer storage and fuelling to vessels. This paper compares two dominant scenarios with regards to GHG emissions and costs. One scenario is based on PV electricity from Morocco, transported to Rotterdam for electrolysis. The other scenario is calculated with electricity from offshore wind farms in the Northern Sea. The calculation of the PV scenario leads to specific emissions for the hydrogen supplied to vessels of 51 gCO2eq/kWhH2 with levelized costs of hydrogen of 0.12 €/kWhH2. The wind scenario led to 16 gCO2eq/kWhH2 with 0.19 €/kWhH2. The electrolysis has the highest impact on emissions and costs, especially the electricity demand. Accordingly, lower emissions of PV electricity supply would have a high influence on the overall results. On the other hand, for the low emission renewable hydrogen supply with wind power a further reduction of the costs of the installation will be relevant.

Tracking aquatic animals for fisheries management in European waters

AbstractAcoustic telemetry (AT) has emerged as a valuable tool for monitoring aquatic animals in both European inland and marine waters over the past two decades. The European Tracking Network (ETN) initiative has played a pivotal role in promoting collaboration among AT researchers in Europe and has led to a significant increase in the number of tagged and observed aquatic animals in transboundary European waters. While AT benefits decision‐making and delivers essential data to management bodies, its potential for management decision‐making mechanisms has yet to be fully harnessed. We reviewed existing research, studies, and organisational initiatives related to aquatic animal tracking and their utility in fisheries management in European waters. We found that AT has already contributed to many aspects of fisheries management, such as improved understanding of stock dynamics, identification of critical habitats, assessment of migration routes, and evaluation of the effectiveness of conservation measures. However, broader utilisation of tracking technologies is needed. By leveraging the full potential of AT, managers can make more informed decisions to protect, restore, and sustainably manage European waters and creatures that live therein.

Sustainable goods transport – inland navigation

Inland navigation plays a crucial role in goods transport, facilitating the movement of goods via rivers and canals. Sustainability in Goods transport involves reducing environmental impact, promoting social responsibility, and enhancing efficiency. Sustainability in goods transport includes optimising transportation routes, investing in fuel-efficient vehicles, and promoting alternative fuels. Green technologies such as GPS tracking and route optimisation software can improve efficiency. Encouraging sustainable packaging materials and carbon offsetting can further reduce environmental impact. Inland navigation can be greener by adopting alternative fuels, improving vessel efficiency, and optimising routes. Maintenance and modernisation of infrastructure, environmental protection measures, and modal shifts from road transport also contribute to sustainability. Various factors influence the performance of inland navigation, including infrastructure, water levels, vessel characteristics, regulations, economic conditions, technological advancements, environmental factors, and social considerations. Integrating sustainable practices and addressing these factors can lead to a more environmentally friendly and efficient goods water transport system. This paper investigates the connections between inland goods transport and sustainability, identifying the main factors. Some basic statistics were collected and analysed to show the performance of inland navigation. The analysis showed that inland navigation is very diverse in Europe, Western Europe is more developed than Eastern European countries. In conclusion, it can be stated that many factors influence the development of Eastern European inland navigation.

Regulatory scoping exercise for the future adoption of autonomous inland ships in Europe

Shipping is a heavily regulated sector, and autonomous ships will by no means be able to escape the public regulator’s agenda. Furthermore, regulatory adaptation is necessary because current laws oppose the introduction of this new technology. In contrast to maritime shipping, in which considerable regulatory work on autonomous ships has already been achieved, the process of adapting inland shipping regulations for autonomous vessels is rather slow, thereby considerably hindering the further development of the sector. An important reason for this is the multi-levelled regulatory institutional structure in European inland shipping, which consequently has less unified rules than its maritime counterpart. In addition, previous research on regulatory obstacles is highly fragmented and restricted in scope. This study presents a systematic regulatory analysis of relevant inland shipping regulations by following the approach adopted by the International Maritime Organisation with respect to maritime shipping regulations, with the objective of identifying potential obstacles in relevant regulatory instruments and common themes across them. It also discusses the existing possibilities under current European Union law for the exceptional operation of autonomous inland ships and describes the latest policy directions taken by the European legislator to foster innovation development within the sector.

Hidrografski premer međunarodnih plovnih puteva u Republici Srbiji

European inland waterways are a key element of the European transport network and are mostly used for freight traffic. The hydrographic surveying is the basis for the maintenance of inland waterways and the establishment of safe navigation. A part of the European waterway corridor E80 consists of the rivers Danube, Sava and Tisza, which part of their course also flows through the Republic of Serbia. On these sections of the mentioned rivers, the competent state institutions are conducting a continuous campaign of hydrographic measurements, which, among other things, includes GNSS RTK positioning and depth measurement with a single-beam ultrasonic echo sounder. In this paper, the characteristics of these sections of rivers, the current methodology of depth measuring and positioning during depth measuring will be shown in details.

Digitalisation and Decarbonisation Challenges of Inland Waterways Freight Logistics Transport and their Integration into Regional Supply Chains – A Case Study

Abstract an era of increased sustainable transport, the European inland navigation industry has received significant attention to attain sustainable transport. Tremendous opportunities to substantially move freight on waterways are present in the UK; however, several challenges have been appropriately addressed, including infrastructural gaps and various institutional support programs. The paper addresses the UK’s current situation of inland navigation and the key challenges affecting the sectors as a viable alternative transport solution. The article explores and summarises the geographic opportunities, commercial feasibility, and the current condition of the UK’S inland navigation sector. From the practical scenario of the UK’s experience, an attempt was made by the authors to find the critical challenges and issues faced by the industry. The emerging themes from the analysis of this paper indicated governance and leadership issues, cooperation, and coordination mechanism between establishments with various functions and responsibilities, merged with infrastructural investment, are strategic elements for expansion in the UK. Conclusively, the authors presented recommendations for improvement and sustainable development.

Development of propulsion solutions for river-sea ships of the northern Black Sea

Conception of hull form and propulsion design of river-sea ships essentially depends on the restrictions of specific inland waterways. River-sea ships of the Northern Black Sea were historically designed for operation through the locks of European inland waterways of the former Soviet Union. River-sea vessels of the late Soviet Union were designed as simple and technological. After dramatic economical changes the ships of new generation acquired completely different features of general and propulsion design. The vessels had unusually full hull forms and azimuthal thrusters. As is shown in the paper, the full hull forms have sound economic grounds for the considered ship type. However, azimuthal thrusters have controversial features and are not non-alternative. Based on analysis of previous and current propulsion solutions their further development is proposed within the considered ship type. Hull forms designed with specially developed CFD methods are recommended as a further step toward propulsion optimality.

The shift toward autonomous European inland waterway shipping: Identifying the gaps in the emerging socio-technical system

The introduction of automated solutions for inland waterways shipping supports the European vision for a sustainable and greener shift within maritime management and logistics. Despite increasing investments, impressive technological advancements, and active discussion to solve the regulatory and business model barriers, socio-technical aspects are still less studied in the preparation for the future of autonomous shipping. This study examines stakeholder and technology roles to map the gaps and challenges created in this emerging space using a system theory approach, specifically a recently developed work design system analysis tool named Change Agent Infrastructure (CHAI) analysis [1]. This framework was chosen to better understand the likely changes of the system with the introduction of automated technology and higher degrees of automation and digitalization in the European inland waterways. The analysis identifies that there are multiple receivers of the change and regulatory bodies will also be actors with considerable responsibilities to direct these changes.

Somatic growth of pikeperch (Stizostedion lucioperca) in relation to variation in temperature and eutrophication in a Central Europe Lake

Global climate change has been altering freshwater ecosystems by impacting many ecological processes, including individual fish growth. Predictions of responses of local fish populations to future environmental change can draw inferences from past long-term biochronological data. In this study, we reconstructed individual growth pattern of one of the most valuable predatory species in European inland waters, pikeperch (Stizostedion lucioperca), using back-calculated length from their otoliths. Samples were collected at the Lipno reservoir (Czech Republic) between 2008 and 2020. We used linear mixed-effects models to investigate how individual state and environmental conditions affect the somatic growth of the local pikeperch population. We found that individual growth rates increased with temperature and tended to be higher when chlorophyll-a concentration was higher, and water transparency was lower. This suggests the species will likely benefit from the warmer waters predicted in future climate scenarios. However, the decreasing nutrient loading associated with efforts to curb eutrophication in Central Europe may offset these benefits. Together, these results provide a better understanding of how multiple environmental factors, directly and indirectly, influence the somatic growth of pikeperch in long term.

Comparative mitogenomics of native European and alien Ponto-Caspian amphipods

European inland surface waters are home to a rich diversity of native amphipod crustaceans, many of which face threats from invasive Ponto-Caspian counterparts. In this study, we analyse mitochondrial genomes to deduce phylogenetic relationships and compare gene order and nucleotide composition between representative native European and invasive Ponto-Caspian taxa across five families, ten genera and 20 species (with 13 newly sequenced herein). We observe various gene rearrangement patterns in the phylogenetically diverse native species pool.Pallaseopsis quadrispinosaandSynurella ambulansexhibit notable deviations from the typical organisation, featuring extensive translocations of tRNAs and the nad1 gene, as well as a tRNA-F polarity switch in the latter. The monophyletic invasive Ponto-Caspian gammarids display a conserved gene order, primarily differing from native species by a tRNA-E and tRNA-R translocation, which reinforces previous findings. However,Chaetogammarus warpachowskyishows extensive rearrangement with translocations of six tRNAs. The invasive corophiid,Chelicorophium curvispinum, maintains a highly conserved gene order despite its distant phylogenetic position. We also discover that native species have a significantly higher GC and lower AT content compared to invasive species. The mitogenomic differences observed between native and invasive amphipods warrant further investigation and could provide insights into the mechanisms underlying invasion success.

Larval pikeperch Sander lucioperca cannibals are more efficient predators on zebrafish Danio rerio than non-cannibals

Cannibalism is an intra-specific predation often resulting in massive mortality in intensive cultured fish species. In piscivorous species, the onset of predation is inevitable. This study explored the link between predation abilities and the onset of cannibalism in pikeperch larvae, a top predator species, with a potential for the European inland aquaculture. Cannibals and non-cannibals, aged between 17 and 34 days-post-hatching, were tested to compare their predatory behavior using zebrafish and pikeperch larvae as prey. Each tested fish was confronted with three other fish (pikeperch or zebrafish) (n = 204 tests) in an arena (20 × 7 × 4 cm with 2 cm of water height, 280 mL) and their behavior was recorded for 20 min. The normal predatory behavioral sequence (orientation, approach, attack and capture) was much more efficient in cannibals (calculated as the ratio of number of captures on the number of attacks) than in non-cannibals in both the predation (0.31 ± 0.28 vs. 0.05 ± 0.15; padjust < 0.0001) and the cannibalism (0.21 ± 0.29 vs. 0.02 ± 0.08; padjust = 0.0006) tests. The shift to a piscivorous diet involved a modification of the attack tactic, replacing a “S-shape” by an attack without “S-shape” but with a tail propulsion. This second tactic developed earlier in cannibals whereas non-cannibals are only able to perform the “S-shape” attack used during the first days of life. Cannibalism was linked to the onset of an efficient piscivory behavior.

A widespread Ponto-Caspian invader with a mistaken identity: integrative taxonomy elucidates the confusing taxonomy ofTrichogammarus trichiatus(=Echinogammarus) (Crustacea: Amphipoda)

AbstractAmphipods have diversified greatly in the Ponto-Caspian region. Although many of these species are prominent invaders their systematics remains unclear. Taking an integrative approach, we investigate the taxonomy of Trichogammarus trichiatus, a widespread invader in European inland waters. It was initially described from the north-eastern Black Sea coast as Chaetogammarus trichiatus by Martynov in 1932. A similar taxon, Chaetogammarus tenellus major, was described by Cărăușu from the western Black Sea in 1943 but later synonymized with C. trichiatus. Chaetogammarus trichiatus was itself shuffled between Chaetogammarus and the Atlanto-Mediterranean Echinogammarus, currently being assigned to Trichogammarus. Our analyses (six DNA markers, 60 measurements and scanning electron microscopic imaging) reveal that T. trichiatus and C. tenellus major are distinct species; the former is a Caucasian endemic, whereas the latter invaded Europe. Unexpectedly, T. trichiatus is an incipient species molecularly nested in Chaetogammarus ischnus, despite pronounced morphological and geographical differentiation. We also recover Chaetogammarus as polyphyletic, yet its member species are nested in the Ponto-Caspian radiation, thus distinct from Echinogammarus. Consequently, we reassign T. trichiatus to Chaetogammarus (Chaetogammarus trichiatus), synonymize Trichogammarus with Chaetogammarus and place C. tenellus major in the new genus Spirogammarus gen. nov. (Spirogammarus major comb. &amp; stat. nov.). Chaetogammarus necessitates further systematic refinement.

An Evaluation of the Dynamics of Some Meteorological and Hydrological Processes along the Lower Danube

The objective of the present work was to perform a 30-year analysis of some significant meteorological and hydrological processes along the Lower Danube. This was motivated by the fact that, due to the effects of climate change, the global configuration of the environmental matrix has suffered visible transformations in many places. Another important factor considered is related to the constant development noticed in the last few decades of European inland navigation, in general, and in the Lower Danube sector, in particular. From this perspective, the processes analysed were the wind speed at a 10 m height, the air temperature at a 2 m height, precipitation, and river discharge. The 30-year period of 1991–2020 was considered for analysis. The ERA5 reanalysis data were processed and analysed in the case of the first three processes, while for the river discharge, the data provided by the European Flood Awareness System were used. The emphasis was placed on the evolution of the extreme values and on the identification of the geographical locations with a higher probability of occurrence. The average values and the seasonal variations of the four processes were also considered. The results indicated that the maximum wind speed and air temperature values along the Lower Danube did not suffer significant changes in the last few decades. However, the values of the minimum air temperatures increased with an average value of about 0.8 °C per decade, and the same tendency was noticed also for the average temperatures. Regarding the precipitation, the trend indicated a tendency to decrease by about 0.5 mm per decade, while for the river discharge, a clear increase of more than 1200 m3/s corresponded to each ten-year period. Finally, it can be concluded that the present analysis provided a global and more comprehensive perspective of the recent environmental dynamics along the Lower Danube, delivering useful information for inland navigation, as well as for other human activities.

Identifying Territorial Values for Tourism Development: The Case Study of Calabrian Greek Area

Specialized tourism based on investments for the construction of main attractors does not represent an effective generalized regeneration strategy for the recovery of European inland rural areas. Remarking on the expected results of national policies and the relative effectiveness of the investment in tourist carriers through the evaluation of case studies, this research argues that the hypothesis to invert abandonment trends through generalized tourism development strategies may not be considered a suitable option in the decision-making process. Instead, the paper proposes a territorial analysis structure that explores socio-ecological dimensions to build knowledge for sustainable strategic plans. The study identifies territorial values in abandoned settlements in Calabrian Greek Area (southern Italy), and presents a new scenario for tourism development that prioritizes investment in supporting local informal tourism welcoming systems as an alternative to large infrastructural investment. Such investment is expected to produce long-term benefits for resident communities in abandoned inland rural areas. The study concludes with general recommendations to improve tourism development policies in a place-based approach.

Lessons learned from accidents on some major European inland waterways

The collection of data on accidents in inland navigation is not mandatory in many European countries. The lack of a harmonized methodology or a centralized database of information on accidents makes it difficult to have a comprehensive picture of safety on European inland waterways. The problem becomes particularly evident in light of significant navigational challenges such as the introduction of autonomous shipping. To provide a better understanding of safety in inland navigation, the paper presents the results of an analysis of data on some 700 accidents which took place on the inland waterways in Austria and Serbia, over a 15-year period (2001/2002–2017). The analysis identifies the safety “hot spots” and the most important safety issues on examined waterways. Contrary to the widely-accepted belief, the results do not confirm that most of the accidents could be attributed to human failures and show that the removal of human operators from inland vessels could only have a limited positive impact on safety unless other aspects (primarily related to maintenance of the fleet and the waterway) are considered. Consequently, the paper outlines the fundamental conditions in which it would be possible to reduce the human presence or even remove the crew from inland ships.

An environmentally relevant concentration of antibiotics impairs the immune system of zebrafish (Danio rerio) and increases susceptibility to virus infection.

In this work, we analysed the transcriptome and metatranscriptome profiles of zebrafish exposed to an environmental concentration of the two antibiotics most frequently detected in European inland surface water, sulfamethoxazole (SMX) and clarithromycin (CLA). We found that those animals exposed to antibiotics (SMX+CLA) for two weeks showed a higher bacterial load in both the intestine and kidney; however, significant differences in the relative abundance of certain bacterial classes were found only in the intestine, which also showed an altered fungal profile. RNA-Seq analysis revealed that the complement/coagulation system is likely the most altered immune mechanism, although not the only one, in the intestine of fish exposed to antibiotics, with numerous genes inhibited compared to the control fish. On the other hand, the effect of SMX+CLA in the kidney was more modest, and an evident impact on the immune system was not observed. However, infection of both groups with spring viremia of carp virus (SVCV) revealed a completely different response to the virus and an inability of the fish exposed to antibiotics to respond with an increase in the transcription of complement-related genes, a process that was highly activated in the kidney of the untreated zebrafish after SVCV challenge. Together with the higher susceptibility to SVCV of zebrafish treated with SMX+CLA, this suggests that complement system impairment is one of the most important mechanisms involved in antibiotic-mediated immunosuppression. We also observed that zebrafish larvae exposed to SMX+CLA for 7 days showed a lower number of macrophages and neutrophils.

Investigating into the challenges of European inland ports: A multifaceted approach

Despite their outstanding importance, challenges of inland ports are hardly focused upon in research. Therefore, many major challenges that European inland ports face are neither systematically identified nor addressed. In times of increasing integration of transport chains and modes, inland ports can serve as pivotal enablers in their natural role as intermodal logistics nodes. Hence, addressing the challenges of inland ports supports the efficiency and resilience of entire transport corridors and even logistics networks. With the findings of this research article, the major challenges of European inland ports are identified, systematically collected, empirically validated through semi-structured interviews, and validated with supporting geospatial analyses. On the basis of the findings of this research article, subsequent research can be motivated, initiated, and perpetuated, respectively.

Knowledge needs in economic costs of invasive species facilitated by canalisation

Canals provide wide-ranging economic benefits, while also serving as corridors for the introduction and spread of aquatic alien species, potentially leading to negative ecological and economic impacts. However, to date, no comprehensive quantifications of the reported economic costs of these species have been done. Here, we used the InvaCost database on the monetary impact of invasive alien species to identify the costs of those facilitated by three major canal systems: the European Inland Canals, Suez Canal, and Panama Canal. While we identified a staggering number of species having spread via these systems, monetary costs have been reported only for a few. A total of $33.6 million in costs have been reported from species linked to European Inland Canals (the fishhook waterflea Cercopagis pengoi and the zebra mussel Dreissena polymorpha) and $8.6 million linked to the Suez Canal (the silver-cheeked toadfish Lagocephalus sceleratus, the lionfish Pterois miles, and the nomad jellyfish Rhopilema nomadica), but no recorded costs were found for species facilitated by the Panama Canal. We thus identified a pervasive lack of information on the monetary costs of invasions facilitated by canals and highlighted the uneven distribution of costs.

Screening of Mercury pollution sources to European inland waters using high resolution earth surface data

Mercury pollution is a cause of high concern for European freshwaters. In this study, we use modelled atmospheric deposition and novel high-resolution water cover and impervious urban areas data to quantify the input of Mercury to European rivers and lakes. This information, combined with estimates of releases from industrial installations and urban wastewater and from soils, yields an overall European budget of water Mercury. Compared to previous estimates, the calculation highlights that direct deposition to permanent and temporary inland water surfaces is a dominant source of pollution. We also show that an important source is the washout of impervious urban surfaces, while releases from soil and industrial and urban wastewater play a lesser, albeit sizable role. The contribution of wastewater to Mercury releases is expected to decrease over time because of more stringent regulations on Mercury use. The analysis confirms that reducing atmospheric deposition (hence air releases) of Mercury remains the single key action to control pollution. However, we show that control of urban runoff discharges to water bodies may be the most effective water management measure in order to reduce Mercury input to coastal and in-land water bodies.