River Landscape Research Articles

Multi-stage ecological pond and reservoir system to enhance river water quality: demonstration study on Periurban River

ABSTRACT Pollution of urban rivers not only destroys the river ecology but also adversely affects the health of residents and urban landscape. In this regard, we selected a certain river in Wuhan for research. In this paper, we utilize the modified bypass multi-stage ecological pond reservoir system, set up the front parthenogenetic pond, aeration and oxygenation pond, ecological purification pond and other processes, supplemented with aeration–bacteriophage coupling, filler-type ecological floating island and other technologies to improve the water quality of the river. Results show that 4 months after the operation of the system, the rate of enhancement in water transparency reached 550%, and with a dissolved oxygen (DO) uplift rate of 322%, in addition, this system achieved 77.98, 77.78 and 74.41% removal of the ammonia nitrogen (NH3-N), total phosphorus (TP), chemical oxygen demand (COD) respectively, and the effluent water quality meets the target water quality standard. The process not only has a good pollutant removal effect, low cost and other characteristics but also can enhance the river landscape and improve biodiversity. It can provide a reference for similar river pollution water quality improvement.

Impact of Landscape Patterns on Water Quality in Urbanized Rivers at Characteristic Scale: A Case of Pearl River Delta, China.

The impacts of landscape patterns on river water quality are commonly acknowledged, but understanding the complex processes by which landscape patterns affect water quality is still limited, especially in densely populated urban areas. Exploring the mechanisms through which landscape characteristics influence water quality changes in urbanized rivers will benefit regional water resource protection and landscape-scale resource development and utilization. Utilizing daily water quality monitoring data from rivers in the urbanized area of the Pearl River Delta in 2020, our research employed canonical analysis and partial least squares structural equation modeling (PLS-SEM) to explore the processes and mechanisms of the influence of urbanized river landscape patterns on surface water quality. The results indicated that total nitrogen (TN) was the critical indicator limiting the water quality of rivers in the Pearl River Delta. The landscape composition and configuration indexes exhibited non-linear variations with scale, and the landscape fragmentation was higher closer to the river. Landscape patterns had the most significant influence on water quality under the characteristic scale of a 5.50 km circular buffer zone, and landscape composition dominated the change of water quality of urbanized rivers, among which 30.64% of the percentage patch area of construction (C_PLAND) contributed 46.40% to the explanation rate of water quality change, which was the key landscape index affecting water quality. Moreover, landscape patterns had a higher interpretive rate of 39.29% on water quality in the wet season compared to 36.62% in the dry season. Landscape composition had an indirect negative impact on water quality, with a value of 0.47, by affecting the processes of runoff and nutrient migration driven by human activities, while landscape configuration had an indirect negative impact on water quality, with a value of 0.11. Our research quantified the impacts of landscape patterns driven by human activities on surface water quality and proposed management measures to optimize the allocation of landscape resources in riparian zones of urbanized rivers. The results provide a scientific basis for water quality management and protection in urbanized rivers.

Considerações sobre a paisagem sociocultural e ambiental do Rio Jaú

Despite fundamental roles of rivers in the history and evolution of urban centers, city design has often disregarded water networks in the midst of accelerated urban expansion. The lack of connection between rivers and the urban landscape has over time contributed to the exacerbation of socio-environmental problems. This research aims at understanding the relationship between the Jaú River and Jaú’s cityscape through the following perspectives proposed by Jean-Marc Besse (2014): historical, sociocultural and socio-environmental landscapes. The river landscape of Jaú is characterized based on information taken from scientific and documentary sources (textual, iconographic and cartographic). The results of analysis are then presented to systematically characterize challenges to landscape planning in this case study. This research pertains to the contemporary effort aiming at understanding landscapes by analyzing historical and current perspectives allowing us to restore connections between a city and its natural environment. In conclusion, it is argued that the neglect of the Jaú River valley throughout urban expansion contributed to the disconnection between the river landscape, the city and its inhabitants’ daily lives. As an alternative, we propose a landscape planning process that integrates the river’s environmental and social dimensions.

Riparian Landscape Change: A Spatial Approach for Quantifying Change and Development of a River Network Restoration Model

Natural river landscapes can be biodiversity hotspots but are one of the most human altered ecosystems with habitats significantly damaged around the world, and a third of fish populations threatened with extinction. While riparian ecosystems have been negatively altered by anthropogenic activities, effective planning and restoration strategies can reverse negative impacts by improving habitat quality. However, restoring rivers requires appropriate data on current riparian health while also considering priorities for different stakeholders. To address this, a Geographic Information System (GIS) was used to create a new and transferable restoration priority model based on a section of the river Linth in Switzerland as a case study. The restoration priority model is founded on connectivity, river condition, national priority species and species hotspots. Landscape change of the riparian zone was analyzed using aerial imagery and landscape metrics. Almost a quarter of rivers within the study area were considered high or very high restoration priority, with many aquatic species set to benefit from restoration. From 1946 to 2019, the riparian landscape became highly fragmented due to significant growth in impervious surfaces and a concomitant loss of agricultural land. The GIS model provides a tool by which environmental agencies can manage natural features over large scales, while also planning priorities and targeting conservation strategies to the areas of greatest need.

Floristic Inventory, Diversity, and Community Structure of the Riparian and Coastal Sand Dune Landscapes in the Lower Padsan River Basin, Laoag City, Ilocos Norte, Philippines

Padsan River basin, the largest river system in Laoag City, Ilocos Norte, encompasses two vital ecological landscapes: coastal sand dunes and riparian areas. Despite its ecological importance, the floristic diversity of these landscapes still needs to be better understood and documented. A vegetation assessment was conducted to characterize the composition, diversity, and community structure of plants in the lower Padsan River landscapes. Eighteen 10 m x 10 m nested quadrats were established across six sampling stations. The study recorded 82 species of vascular plants from 80 genera and 41 families. Fifty-two percent are introduced species, 48% are native species, and 27% are invasive species. The plant life forms are composed of trees (34 spp.), herbs (17 spp.), vines (13 spp.) and grasses (9 spp.). Fabaceae and poaceae were the most species-rich plant families. Prosopis juliflora (Candaroma) was the most dominant tree species, comprising 29% of the entire population. The lower Padsan River basin landscapes exhibits moderate tree diversity (H’ = 2.7), with Shannon diversity indices ranging from 0.89 to 2.43 across sampling locations. The riparian areas showed higher tree Shannon diversity, richness, and evenness, while the coastal sand dune areas had higher tree dominance but lower Shannon diversity. The plant community structure varies between the two types of ecological landscapes (ANOSIM Global R=0.7, p<0.05). P. juliflora dominates the coastal sand dune, while a mix of the Leucaena-Pithecellobium-Terminalia community characterizes the riparian area. This study provides essential baseline information on the floristic diversity and community structure, serving as a foundation for developing an integrated river management plan and strategies for conserving important ecological landscapes in the downstream section of the Padsan River Basin.

FEATURES OF THE DESIGN OF CHILDREN'S PLAYGROUNDS IN THE STRUCTURE OF RESIDENTIAL COMPLEXES

In the context of urbanization, the origins and main stages of the formation of children's gaming platforms, starting from the mid-nineteenth century to the present day, have been investigated, and the key significance of the game as a systemic factor has been established. Their development. In current minds, starting from the 80s of the 20th century, and the decline of normative influences, a wide variety of children's play areas have been recorded, not only in the courtyard middle of residential complexes, but also in the structure of towns and admixtures of the landscape river activity, and on the days and on the internet 'eras of richly functional huge complexes. The children's play area is examined as a “design space” in the open architectural space of the courtyard of a residential complex or landscape-recreational design. It is clear that the children of the gaming “design spaces” in their own micro-level add not only functional diversity to the vast spaces, but also, with their exclusive design solutions, become their own tractors of the gentleman's life. The main features of “design spaces” have been identified, which may include rich functionality, ergonomics (compactness and proportionality), a high level of comfort (physiological, emotional-psychological) , aesthetic) and technical equipment, obviously, interactivity and intelligence in the design space, the ability to respond to There are different types of drivers and they change depending on the situation and safety. A number of principles have been proposed - complexity, hierarchy, exclusive design, which revolve around such valuable imperatives as the creation of a safe environment for development; directness to maximize the child's potential in the process of play; organization of space that inspires creativity and exudes artistic and functional comfort. Keywords: design, children's playground, residential complexes, urban environment.

Geomorphic effect of landslide dam on the Jinsha River

As an extreme surface process, landslide dam affects the long-term change of river landform, especially the change of channel and hillslope. The Jinsha River is located on the eastern edge of the Qinghai-Tibet Plateau, the structural geology is active, developed more landslide geological disaster. Based on the 30 m SRTM DEM, we automatically extracted the river longitudinal profile, steepness index, river knickpoint and excess topography using TopoToolbox. Through interpretation of remote sensing imagery and field work, we identified 660 landslide dams, more than 90% are located in the excess topography with a threshold hillslope of 30. Our analysis reveals that there are 481 river knickpoints were extracted with heights above 30 m, Among them, 70 river knickpoints have good spatial correlation with the landslide dam, landslide dam has an impact can form knickpoints of up to 478m. In the densely distributed river channel of the landslide dam, the steepness index with the relatively high values. Therefore, landslide dams may have a significant inf1uence on the channel and hillslope, we should pay attention to the role of landslide dam in the evolution of river landscape.

Automatic Group Decision-Making for Algal Bloom Management Based on Information Self-Learning

The phenomenon of algal bloom seriously affects the function of the aquatic ecosystems, damages the landscape of urban river and lakes, and threatens the safety of water use. The introduction of a multi-attribute decision-making method avoids the shortcomings of traditional algal bloom management that relies on manual experience. However, the weight-calculation part of this method still receives the artificial influence of human factors, which reduces the accuracy and scientific rigor of the decision. This paper presents a group decision-making method based on information self-learning which makes decision weights automatically clustered and assigned. A general framework of decision-making management is constructed for the algal bloom management process. In the decision-making process, an improved density-based clustering algorithm is used to automatically cluster and rank the decision data in the form of the three-parameter interval number, and ultimately obtain the optimal management method that meets the management objectives. Finally, the method was applied at the monitoring station of Sanjiadian Reservoir in Beijing, China. Based on the treatment objectives and water quality monitoring data of the station, relevant experts were invited to evaluate the management solutions, and the information self-organizing algorithm of this paper was used to automatically rank the decision-making methods, and finally obtain the most suitable management method for the station. Comparison with the water quality data and treatment inputs after the previous man-made selection of treatment options, and discussion among experts, show that the decision-making method is feasible and effective, and contributes to the sustainable treatment of algal blooms.

Flow resistance in the channel-bar landscape of large alluvial rivers

Flow resistance in the channel-bar landscape of large alluvial rivers

Development of Village Ecotourism in Sindangkasih Tourism Village Based on Tourism Satisfaction and Preference in Garut Regency

Tourist visits are an important aspect of maintaining the existence of tourist destinations, including in the Garut Regency area. This district has great potential in developing village ecotourism. Sindangkasih Tourism Village, one of the tourist villages in Garut Regency, has great potential for developing village ecotourism. The research aims to identify ecotourism resources and identify tourist satisfaction and preferences using a questionnaire with a Likert scale of 1-7 from 30 tourist respondents. Data collection was carried out over three months, from April to June 2022. wild fauna as well as the seven elements of culture. The results of the tourist assessment regarding satisfaction with the highest score on natural attractions, namely river landscapes and natural scenery, and cultural attractions, namely art. Tourists rate very satisfied with transportation to tourist villages and tourist routes. Tourists at a general rate are satisfied with the facilities and infrastructure in the village, besides that they are very satisfied with the tourism activities carried out at the Ngagogo pond, playing in the river and enjoying the natural scenery. The highest preference for tourism activities is enjoying natural scenery and playing traditional games during holidays taking into account the existence of the attractions provided.

Environmental Impact of Kakhovka Dam Breach and Chernobyl Nuclear Power Plant Explosion on Dnieper River Landscape

Environmental Impact of Kakhovka Dam Breach and Chernobyl Nuclear Power Plant Explosion on Dnieper River Landscape

The Need for International Cooperation between Israel and Other Middle East Nations to Protect the Jordan River Landscape

The Need for International Cooperation between Israel and Other Middle East Nations to Protect the Jordan River Landscape

The natural territorial structure of the landscape of the Prut River within the Chernivtsi region, its anthropogenic transformations and features of the functioning of the flow-riverbed-flood system

The purpose of this publication is to reveal the main regularities of the territorial structure and hydromorphological features of the young river landscape using the example of the Prut River in natural conditions and under the influence of anthropogenic activity. To achieve the goal, a three-level taxonomic system of the territorial organization of river valley landscapes and the corresponding method of identification of territorial units were applied. The main operational unit of the study is the homogeneous sections of the riverbed and floodplains and the young river landscape formed on their basis. Various methods of analyzing anthropogenic impact on the functioning of the flow-channel-floodplain system (FCFS) have also been applied. The specificity of the development and territorial structure of the young river landscape in natural conditions is significantly related to the combination of the features of the river regime and the complex system of neotectonic movements. Based on the obtained database on the natural state of the young river landscape (YRL) and its anthropogenic changes, an assessment of the current state of the young river landscape was carried out. An analysis of the negative consequences of anthropogenic cutting of rivers, which affects the state of the young river landscape and river ecosystems, and requires objective periodic monitoring of its state, was also performed. The natural state of the young river landscape formed based on the riverbed and floodplain has been significantly affected by human activity. The main anthropogenic factors include the influence of engineering structures and the extraction of channel alluvium. The joint action of these factors led to significant changes in the riverbed and floodplain process, powerful anthropogenic downcutting of the river, compression of the long-term strip of channel formation and a number of negative consequences concerning both ecosystems and the anthropogenic landscape in general. We have developed the appropriate methodology and taxonomic system for the identification of the HARF, the young river landscape (YRL), which includes a geospatial analysis of the territorial structure of river valleys. First of all, sufficiently developed, main components of river-valley systems – «stem valleys» – are considered. It is worth noting that geomorphological and hydromorphological processes are important for explaining the genesis and identification, as well as geospatial analysis of river valley landscapes. The main factors of anthropogenic load on the hydromorphological base of the MRL include engineering influence and river alluvium extraction. The main types of engineering impact are coastal protection, flood dams and bridge crossings. The action of the mentioned factors has a cumulative effect and gradually led to the downcutting of the river, the narrowing of the long-term strip of channel formation, changes in channel and floodplain processes, and changes in the spatial structure of the river landscape. Thus, hydromorphological processes can significantly affect the state and functioning of the YRL in general, as well as negatively affect engineering structures and hydro-ecological risks in particular. Keywords: Prut river, riverbed, floodwater, young river landscape, territorial structure of the river landscape, homogeneous area of the riverbed and floodplain (harf), natural condition, anthropogenic influence.

Respiro dell'acqua ad Ho Chi Minh city

The research entitled Flood Risk Management Prevention, Adaptation and Resilient Strategies in Ho Chi Minh city, the partial outcomes of which are presented in this text, is framed within the Projects of Great International Relevance of the Italian Ministry of Foreign Affairs and International Cooperation for the consolidation of bilateral relations between Italy and Vietnam. The University of Trento, the IUAV University of Venice and the Vietnam National University are working together to propose alternative landscape and hydraulic scenarios to face the challenges posed by the excessive anthropic load and climate change that squeeze and weaken the river landscape of the metropolis, not allowing the fragile lacustrine territories to breathe adequately.

La Seine à la Belle Époque : La construction d’un mythe moderne

A recurring motif in the urban literature that was formed around Haussmannian Paris, the Seine with its waters, its banks, the railway activities that cross it, builds its own myth around an artistic and poetic destiny. Devalued by the writers and poets of the 19th century, it experienced its golden age at the turn of the century thanks to the enthusiasm shown by the Impressionists for aquatic and river landscapes. We have to wait for the Belle Epoque and its euphoria, the fresh look of a foreign diaspora, as well as a poetic revolution that decentralizes the subject and focuses on the spaces where it evolves, to rehabilitate the Seine and make it a modern myth.

Inversion of Late Miocene uplift history from the transient Daxia River landscape, NE Tibetan Plateau

The mechanisms of the upward and outward growth of the Tibetan Plateau are crucial for understanding the geodynamic significance of Cenozoic continental collisions. Northeastern Tibet has been suggested as one of the youngest deforming and uplifting margins surrounding the plateau. The existence of fluvial knickpoints and low-relief topographic surfaces along the Yellow River and its tributaries indicate the transience of the landscape in response to active tectonic uplift. Therefore, the uplift history of the North Eastern Tibetan Plateau (NETP) can be potentially inverted from the disequilibrium channel profiles of the Yellow River and its tributaries. The West Qinling Fault (WQF) is part of the geomorphological and topographic boundaries of the NETP. Its uplift history helps to clarify the deformation history of the Tibetan Plateau. In this study, the focus was on the Daxia River (one of the Yellow River tributaries) to identify the distribution of peneplain surfaces and knickpoints, and to present a linear inversion on the fluvial longitudinal profiles for the relative uplift history of the West Qinling. We obtained a relative uplift history with two pulses of change in the uplift rates at ∼5 and ∼2 Ma. Rates of relative uplift maintained low values during the Late Miocene, then slowly increased from 0.1 to 0.2 mm a −1 after ∼5 Ma and suddenly jumped to 0.3 mm a −1 at ∼2 Ma, consistent with recent findings on the deformation records in the NE Tibetan Plateau. We suggest that (1) the Late Miocene–Pliocene landscape evolution was driven by both tectonics and climate change and (2) inversion of the transient longitudinal channel profiles, if applied, may provide broader insights into the upward and outward growth patterns of the NE Tibetan Plateau. Thematic collection: This article is part of the Mesozoic and Cenozoic tectonics, landscape and climate change collection available at: https://www.lyellcollection.org/topic/collections/mesozoic-and-cenozoic-tectonics-landscape-and-climate-change

An ancient river landscape preserved beneath the East Antarctic Ice Sheet

The East Antarctic Ice Sheet (EAIS) has its origins ca. 34 million years ago. Since then, the impact of climate change and past fluctuations in the EAIS margin has been reflected in periods of extensive vs. restricted ice cover and the modification of much of the Antarctic landscape. Resolving processes of landscape evolution is therefore critical for establishing ice sheet history, but it is rare to find unmodified landscapes that record past ice conditions. Here, we discover an extensive relic pre-glacial landscape preserved beneath the central EAIS despite millions of years of ice cover. The landscape was formed by rivers prior to ice sheet build-up but later modified by local glaciation before being dissected by outlet glaciers at the margin of a restricted ice sheet. Preservation of the relic surfaces indicates an absence of significant warm-based ice throughout their history, suggesting any transitions between restricted and expanded ice were rapid.

Sequential riparian vegetation alteration in Japanese river landscapes

Bare gravel bed channels have been a common landscape feature of the middle reaches of rivers throughout Japan. They are disappearing these days because of vegetation colonization. Vegetation coverage of the riparian zones in the midstream reaches of rivers distributed throughout Japan was investigated using aerial photo images taken in 1946, 1975, and 2010. It was then compared with hydrological and water quality records, locations of dams and weirs, residential conditions of the surrounding areas, sediment yields, and forest coverage of the upstream mountainous areas. Riparian vegetation coverage has substantially increased in the last 70 years, from nearly 0 to 30-40%. Herbaceous vegetation coverage is higher than tree coverage. The total vegetation coverage did not correlate with water quality parameters. However, vegetation coverage had a significant negative correlation with the upstream basin's sediment yield and a slight negative correlation with the maximum flood peak flow rate. It was positively correlated with the terrestrial area fraction between levees. Riparian vegetation coverage was high within the 2 km downstream of dams or weirs, intercepting sediment flows. These results indicated that the gravelly sediment supplied from the upstream and deposited in the midstream at flood time has been the major contributor to keeping the vegetation coverage low rather than flushing by flood water. Reforestation since World War II has reduced the coarse sediment supply into the midstream river channels. This reforestation, together with gravel mining and intercepting sediment flow by dams and weirs, has caused the recent increase in vegetation coverage of the riparian zones. Human intervention can affect the vegetation conditions in riparian zones by decreasing sediment supply to river channels.

Freshwater fish diversity in the western Amazon basin shaped by Andean uplift since the Late Cretaceous

South America is home to the highest freshwater fish biodiversity on Earth, and the hotspot of species richness is located in the western Amazon basin. The location of this hotspot is enigmatic, as it is inconsistent with the pattern observed in river systems across the world of increasing species richness towards a river’s mouth. Here we investigate the role of river capture events caused by Andean mountain building and repeated episodes of flooding in western Amazonia in shaping the modern-day richness pattern of freshwater fishes in South America, and in Amazonia in particular. To this end, we combine a reconstruction of river networks since 80 Ma with a mechanistic model simulating dispersal, allopatric speciation and extinction over the dynamic landscape of rivers and lakes. We show that Andean mountain building and consequent numerous small river capture events in western Amazonia caused freshwater habitats to be highly dynamic, leading to high diversification rates and exceptional richness. The history of marine incursions and lakes, including the Miocene Pebas mega-wetland system in western Amazonia, played a secondary role.

Spatial distribution of rock uplift in the Bongarà district (Peruvian Andes) and implications for the genesis of supergene ore deposits

Topography and river landscape morphometry of two hydrographic basins, the Utcubamba River and the Chiriaco River basins (Bongará district, Amazonas region) allowed to determine the relationship between the irregular distribution of vertical motions (e.g., rock uplift) and the genesis of supergene Zn deposits. The latter derives from variable weathering of pre-existing carbonate-hosted Zn sulfides orebodies, in three distinct localities: Florida Canyon, Mina Grande and Cristal. The research was carried out through the evaluation of the parameters such as elevation, local relief, swath profile, river longitudinal profiles and transformed river profiles (χ-long profiles), and slope/area analysis to derive the normalized channel steepness index (ksn). The NE-ward sharp increase in mean and minimum elevation coupled with a jump in the mean ksn values, suggests that the Chiriaco River basin has experienced more recent rock uplift than the Utcubamba River basin. In fact, the Utcubamba River experienced a long-lasting uplift, resulting in a rugged local relief and lowering the mean and minimum elevations, and exhumation and weathering of the Triassic-hosted sulfide mineral deposits at Florida Canyon. In the Chiriaco River basin, the younger uplift has promoted the weathering of the more surficial Jurassic-hosted Mina Grande and Cristal mineral deposits. The morphometric approach proved to be effective in recognizing fertile areas with near-surface orebodies also in regions characterized by distinct types of ore deposits.