scholarly journals Przekształcenie obszaru wysoczyzny lessowej pod wpływem gospodarczej działalności człowieka w neoholocenie (na wybranych przykładach z okolic Mozgawy, Ponidzie Pińczowskie)

2021 ◽  
Vol 66 (3) ◽  
pp. 89-103
Author(s):  
Piotr Szwarczewski
Keyword(s):  
Human Impact ◽  
River Basin ◽  
Natural Environment ◽  
River Channel ◽  
Alluvial Fan ◽  
Neolithic Period ◽  
Karst System ◽  
The Loess Plateau ◽  
Surface Level ◽  
Agricultural Use

The Mozgawa area, located in the Ponidzie Pińczowskie Region (SE part of the Nida River Basin), is a very good example of response of the natural environment to the progressive human impact. The research conducted there indicates that before the appearance of the first Neolithic farmers, the relief of the area was different to the modern one. Constant and intensive agricultural use of the loess plateau and the adjacent slopes (started in the Neolithic period some 5890±100 BP) led to the filling of the valley bottoms and local depressions with deluvial deposits, the thickness of which reaches up to 12 m. The deposition of these sediments and elevation of the surface level in the subordinate areas resulted in the creation of the Mozgawka River channel since the begining of the Roman Period. Formerly it was impossible (as it was within the depression) and the runoff was only through the karst system. Since that moment it has also started the accumulation of the alluvial fan, the progradation of which leads to the pushing of the Nida River channel towards the East.

scholarly journals Materials of the Neolithic settlement of the Komarin 5 in the Verkhny Dnepr River basin (Gomel Podneprovie), on the basis of excavations 1998, 2005-2007, 2011

2017 ◽  
Vol 6 (3) ◽  
pp. 155-163
Author(s):  
Igor Nicolaevich Ezepenko ◽  
Oleg Vasilievich Voronenko
Keyword(s):  
River Basin ◽  
Middle Ages ◽  
Neolithic Period ◽  
Cultural Community ◽  
Late Middle Ages ◽  
Neolithic Age ◽  
Introductory Part ◽  
Archaeological Materials ◽  
Absolute Dating ◽  
The Neolithic Age

In the article the authors summarize the archaeological studies of the Neolithic settlement Komarin 5 in vicinity of Rogachev, Gomel region. The settlement is situated in the northern periphery of the area of the Dnepro-Donetsk ethno-cultural community. In the introductory part of the article the authors present the main approaches in interpreting of the Neolithic monuments with comb-stroke ceramics in the upstream of the Dnepr. The excavations were carried out in the southern part of the man site during 4 field seasons. There is a brief description of the stratigraphy of the studied settlement, the most representative burial and utility objects of the excavation-2 in 2006, the main categories of flint tools, and the ceramic complex of the Neolithic period in the article. With the help of the ceramic complexes we can fix several stages of the development of the territory, from the Neolithic Age till the Late Middle Ages. The overwhelming part of the archaeological materials, especially ceramics, is considered in the context of the III stage of the development of the Dnepro-Donetsk culture and covers a chronological interval within the IV millennium BC. This is confirmed by the only absolute dating of 478090 BP (Кі-15033) with the soil from the pit filling in the utility building (object 2 of the excavation in 2006). The issues of relative and absolute dating of the monument Komarin-5, in particular the top chronological boundary of the Neolithic Dnepro-Donetsk culture, are considered.

scholarly journals The Impacts of Land Use Patterns on Water Quality in a Trans-Boundary River Basin in Northeast China Based on Eco-Functional Regionalization

2018 ◽  
Vol 15 (9) ◽  
pp. 1872 ◽  
Author(s):  
Peixuan Cheng ◽  
Fansheng Meng ◽  
Yeyao Wang ◽  
Lingsong Zhang ◽  
Qi Yang ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
River Basin ◽  
Natural Environment ◽  
Flow Region ◽  
High Flow ◽  
Land Use Patterns ◽  
Use Patterns ◽  
The Impact ◽  
Degraded Water Quality

The relationships between land use patterns and water quality in trans-boundary watersheds remain elusive due to the heterogeneous natural environment. We assess the impact of land use patterns on water quality at different eco-functional regions in the Songhua River basin during two hydrological seasons in 2016. The partial least square regression indicated that agricultural activities associated with most water quality pollutants in the region with a relative higher runoff depth and lower altitude. Intensive grazing had negative impacts on water quality in plain areas with low runoff depth. Forest was related negatively with degraded water quality in mountainous high flow region. Patch density and edge density had major impacts on water quality contaminants especially in mountainous high flow region; Contagion was related with non-point source pollutants in mountainous normal flow region; landscape shape index was an effective indicator for anions in some eco-regions in high flow season; Shannon’s diversity index contributed to degraded water quality in each eco-region, indicating the variation of landscape heterogeneity influenced water quality regardless of natural environment. The results provide a regional based approach of identifying the impact of land use patterns on water quality in order to improve water pollution control and land use management.

scholarly journals Changes in stage–flow relation of the East River, the Pearl River basin: causes and implications

2012 ◽  
Vol 44 (4) ◽  
pp. 737-746 ◽  
Author(s):  
Qiang Zhang ◽  
Kun Li ◽  
Vijay P. Singh ◽  
Xiaohong Chen ◽  
Jianfeng Li
Keyword(s):  
Water Level ◽  
River Basin ◽  
Flood Control ◽  
Morphological Changes ◽  
River Channel ◽  
Pearl River Basin ◽  
Abrupt Decrease ◽  
East River ◽  
The Pearl River ◽  
High Level

Water level and streamflow extracted from 891 hydrological episodes from both dry and flood seasons covering a period of 1954–2009 were analyzed to investigate stage–flow relations. Results indicate the following. (1) Since the early 1990s the low/high flow is increasing/decreasing. The water level, particularly the high level, is consistently decreasing. An abrupt decrease of water level is observed since the early 1990s at the lower East River. (2) Stage–streamflow relation is usually stable in the river reach with no significant bedform morphological changes. Changes in the geometric shape of the river channel are the major cause of the change in the stage–streamflow relation. (3) An abrupt decrease of water level at the Boluo station is mainly the result of abnormally rapid downcutting of the riverbed due to extensive sand dredging within the channel which caused serious headwater erosion. This human-induced modification by downcutting of the river channel may lead to significant hydrological alterations and may have critical implications for flood control, conservation of eco-environment, and also for basin-wide water resources management in the lower East River basin.

scholarly journals Characteristics and Prevention of the Debris Flows following Wenchuan Earthquake in Jushui River Basin, An County, China

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Yonggang Ge ◽  
Jianqiang Zhang ◽  
Xiaojun Guo
Keyword(s):  
Debris Flow ◽  
Wenchuan Earthquake ◽  
River Basin ◽  
Debris Flows ◽  
Flash Flood ◽  
River Channel ◽  
Hazard Identification ◽  
Control Mode ◽  
Potential Hazard ◽  
Prevention Measures

After analysing the catastrophic debris flows on August 18, 2012, and on July 9, 2013, in Jushui River basin, An County, the Wenchuan Earthquake seriously striken areas, it was found that they were characterized by the clay soil content of 0.1~1.2%, the density of 1.68~2.03 t/m3, the discharges of 62.2 m3/s to 552.5 m3/s, and the sediment delivery modulus of 1.0~9.4 × 104 m3/km2. Due to intense rainstorm, many large debris flows produced hazard chain, involved in flash flood, debris flow, dammed lake, and outburst flood, and rose Jushui River channel about 1~4 m as well as amplified flood. The hazards and losses mainly originated from the burying and scouring of debris flows, flood inundating, and river channel rise. The prevention of debris flows is facing the intractable problems including potential hazard identification, overstandard debris flow control, control constructions destructing, and river channel rapid rise. Therefore, the prevention measures for the basin, including hazard identification and risk assessment, inhabitants relocating, monitoring and alarming network establishing, emergency plans founding, and river channel renovating, and the integrated control mode for watershed based on regulating the process of debris flow discharge, were recommended for mitigation.

Unionid mussel composition and ditch environments in floodplain and alluvial fan geomorphic types: a case study of a Lake Biwa river basin

Limnology ◽  
2016 ◽  
Vol 18 (1) ◽  
pp. 41-49 ◽  
Author(s):  
Mitsunori Nakano ◽  
Koh-Ichi Takakura ◽  
Kiyohito Morii ◽  
Misako Urabe
Keyword(s):  
River Basin ◽  
Lake Biwa ◽  
Alluvial Fan
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