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Tytuł:
Multi parametric GIS analysis to assess gully erosion susceptibility : a test in southern Sicily, Italy
Autorzy:
Agnesi, V.
Angileri, S.
Cappadonia, C.
Conoscenti, C.
Rotigliano, E.
Powiązania:
https://bibliotekanauki.pl/articles/294669.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully erosion
GIS
susceptibility
Sicily
Opis:
A GIS+analysis was carried out in a test basin of southern Sicily, the Magazzolo River basin, in order to assess susceptibility conditions to gully erosion phenomena. The linear density of ephemeral and permanent gullies computed within each class of nine environmental variables was used to generate a gully erosion susceptibility map for the area. A validation procedure carried out in order to test the reliability of the adopted method highlighted a clear correlation between the occurrence of gullies and the computed susceptibility levels.
Źródło:
Landform Analysis; 2011, 17; 15-20
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ephemeral gully erosion from agricultural regions in the Pacific Northwest, USA
Krotkotrwala erozja wawozowa na obszarach rolniczych w polnocno-zachodnim regionie Pacyfiku, USA.
Autorzy:
Barber, M E
Mahler, R.L.
Powiązania:
https://bibliotekanauki.pl/articles/81715.pdf
Data publikacji:
2010
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
soil erosion
ephemeral erosion
gully erosion
sediment
erosion control
remote sensing
agricultural region
Pacific Northwest region
USA
Opis:
Soil erosion continues to be problematic financially and environmentally with the USEPA ranking sediment as one of the top ten pollutants of concern in the USA. One aspect of erosion often overlooked is the role of ephemeral gullies in terms of quantity of sediment produced and amount exported to nearby waterways. Current physically-based and empirical models are inadequate for predicting this type of erosion particularly at the watershed scale. A new methodology for predicting the quantity and location of sediment delivery was developed and tested via a case study. Aerial ephemeral gully erosion rates varied from 33.6 mton/km2 (0.15 U.S. tons/acre) in the Big Bear Creek basin to 88.4 mton/km2 (0.39 U.S. tons/acre) in the Middle Potlatch Creek basin representing 2.3 to 7.7% of the total surface sediment load. This information was used to develop a predictive Erosion Potential Index (EPI) that uses LANDSAT aerial imagery combined with readily available soils information and a digital elevation model to identify the most probably locations of ephemeral gully development. High resolution aerial imagery was used to quantify actual ephemeral gully locations which were then compared to the EPI predicted locations to verify the procedure. High resolution aerial imagery was also used to quantify the amounts of soil erosion from ephemeral gullies in basins of the Potlatch River system.
W pracy przedstawiono nowa metodykę prognozowania wielkości i miejsc występowania erozji wąwozowej w skali zlewni, którą sprawdzono na podstawie badań przeprowadzonych na obszarze o łącznej powierzchni 736 km2, w sześciu zlewniach mniejszych cieków położonych w środkowej części zlewni rzeki Potlatch. W badaniach wykorzystano zdjęcia lotnicze wysokiej rozdzielczości oraz wyniki pomiarów terenowych parametrów morfologicznych krótkotrwałych wąwozów erozyjnych, na podstawie których stworzono bazę danych GIS. Uzyskane wyniki badań posłużyły do opracowania Indeksu Erozji Potencjalnej (EPI), do określenia którego wykorzystano obrazowania satelitarne LANDSAT w połączeniu z numerycznym modelem terenu oraz dostępnymi informacjami o glebach. W celu weryfikacji procedury wykorzystano zdjęcia lotnicze wysokiej rozdzielczości do określenia ilościowego lokalizacji wąwozów erozyjnych, a następnie porównano z wartościami EPI, wskazującymi przewidywane miejsca występowania wąwozów. Zdjęcia lotnicze wysokiej rozdzielczości wykorzystano również do oceny ilościowej wielkości erozji gleb spowodowanej erozją wąwozową w zlewni rzeki Potlatch.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 23-29
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological characteristics of ephemeral gullies in Sicily, south Italy
Autorzy:
Capra, A.
Di Stefano, C.
Ferro, V.
Scicolone, B.
Powiązania:
https://bibliotekanauki.pl/articles/294635.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
ephemeral gully erosion
erosion measurements
morphological characteristics
rill erosion
Sicily
Opis:
Ephemeral gullies (EGs) are channels of different sizes refilled by tillage equipment normally used on farms. In this paper, the data-set collected from 1995 to 2007 in a wheat--ultivated area in Raddusa (Sicily, Italy), having a surface of almost 80 ha, were used to analyze the morphological characteristics of EGs. The measurements show an high temporal variability in EG characteristics. The EG measurements and the rill erosion measurements carried out in 15 plots located in the experimental "Sparacia" area (Sicily), demonstrated that a morphological similarity condition exists between rills and ephemeral gullies. The occurrence of step-pool structures in an EG occurring in the observation period in the same place allows to conclude that, in the considered environment, an ephemeral channel, such an EG, similarly to a stream, tends to reach a step-pool morphology as the structure that maximises its stability.
Źródło:
Landform Analysis; 2011, 17; 27-32
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Types of gullies and conditions of their development in silvicultural loess catchment (Szczebrzeszyn Roztocze region, SE Poland)
Autorzy:
Dobek, K.
Demczuk, P.
Rodzik, J.
Hołub, B.
Powiązania:
https://bibliotekanauki.pl/articles/294637.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully in forest area
gully types
Roztocze region
SE Poland
Opis:
The aim of this paper is to present a characteristic of loess permanent gullies, which form the branched erosion system, with the total length of almost 7.8 km, dissecting an erosion-denudation dry valley. Only 20%of the gully system catchment is cultivated as the result of steep slopes and considerable height differences up to 100 m. 80%of the catchment is covered by fir coniferous forest and Carpathian beech forest, and gully development is the result of intensive forest exploitation. Five types of gullies have been selected on the basis of the runoff directions, which are determined by the following: original relief, runoff concentration from fields, runoff concentration from fallplaces, skidding and course of forest roads used to carry a timber.
Źródło:
Landform Analysis; 2011, 17; 39-42
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparison of the effects of two approaches to control gully erosion in the Black Soil Region of China
Autorzy:
Dong, Y.
Wu, Y.
Wang, W.
Powiązania:
https://bibliotekanauki.pl/articles/294647.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully control
soil fill
vegetation cover
Opis:
Gully erosion is an important form of soil erosion, however, little was done on the effect of gully erosion controlling approaches. A program for controlling gully erosion was carried out in Heshan Farm in black soil region of northeast China from 1994 to 1996 include two approaches: "Soil fill" and "Vegetation cover". From the investigation at 2009, Soil fill approach can protect the original place of gully erosion well, but this apporach ignores the whole impact at the catchment scale, and may cause to new gully appear. "Vegetation cover" approach is better to control gully erosion than "Soil fill" approach, but has little effect on controlling the headcut retreat.
Źródło:
Landform Analysis; 2011, 17; 43-46
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geologiczno-inżynierskie i geomorfologiczne uwarunkowania erozji wąwozowej w lessach w rejonie Kazimierza Dolnego (wąwóz Opolska Droga)
Engineering-geological and geomorphological conditions of gully erosion in loess deposits in the Kazimierz Dolny area (Opolska Droga Gully)
Autorzy:
Frankowski, Z.
Grabowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/2074497.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
erozja gleby
erozja wąwozowa
pokrywa lessowa
geomorfologia
Kazimierz Dolny
loess gully erosion
shear strength and natural moisture content in loess
Opis:
The article presents the problem of intense erosion in loess gullies in the locality Kazimierz Dolny. Primary reasons for such a quick development of gullies are: lithogenetic and physical-mechanical characteristics of loess, geomorphological and climatic conditions of the region and also human activity. Gully erosion impedes rural activity and communication in the area and causes considerable damages to local roads. In one of the loess gullies typical for the region, called ,,Opolska Droga” near Kwaskowa Góra, physical and mechanical parameters were examined by field and laboratory tests. The results revealed a clear correlation: shear strength of loess considerably decreases when its natural moisture content increases. What is also important, the structure of loess — loose soil skeleton mostly built of quartz and small amount of cementing clay particles — is prone to erosion. Thus, its adverse susceptibility to influence of water occurs to be primary reason of intensive gully erosion development in the area of Nałęczów Plateau . Additionally, geomorphological and climatic conditions, together with human rural activity (often using gullies as local ways of road transport) result in faster erosion development and, in effect, they lead to disastrous results like those that took place in the region during extreme rainfalls some years ago. Any stabilizing engineering works within loess gullies should be preceded by appropriately designed system for the regulation of run-off in the drainage area.
Źródło:
Przegląd Geologiczny; 2006, 54, 9; 777-783
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Availability and characteristics of the historical and recent aerial photographs and orthophotographs in Spain for the analysis of rill and gully erosion
Autorzy:
García, Jariego
Gutiérrez, Gómez
Lavado Contador, F.
Schnabel, S.
Powiązania:
https://bibliotekanauki.pl/articles/294358.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
rill and gully erosion
aerial photographs and orthophotograph
Spain
Opis:
Several kinds of methodologies and techniques have been used indeed in order to monitor rill and gully erosion processes. In this paper authors provide a guidance regarding the available aerial photographs and orthophotographs for rill and gully erosion studies in Spain and covering the whole country. A set of 8 different series of aerial photographs and orthophotographs were located in Spain. Their characteristics were quite diverse, differing in scales, formats and resolution. Most of the photographs and orthophotographs proved, at least, to be suitable for their use in studies of permanent gullies, allowing the monitoring of medium and long-term erosion rates since 1945.
Źródło:
Landform Analysis; 2011, 17; 51-55
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erozja wąwozowa w zachodniej części Płaskowyżu Nałęczowskiego
Gully erosion in the western part of the Nałęczów Plateau (Lublin Upland).
Autorzy:
Gardziel, Z.
Harasimiuk, M.
Jezierski, W.
Pawłowski, A.
Zgłobicki, W.
Powiązania:
https://bibliotekanauki.pl/articles/2074492.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
erozja wąwozowa
Płaskowyż Nałęczowski
gully erosion
loess areas
Nałęczów Plateau
Opis:
The areaswith thick loess covers face the risk of intense soil erosion processes as well as gully erosion. The western part of the Nałęczów Plateau is especially prone to particularly high degree of intensive erosion among the region (denudation hazard. The density of the gully network reaches here up to 10 km/km2. The administrative area of Kazimierz Dolny is under extreme threat of severe consequences of erosion processes which appeared with high frequency and caused significant devastation of infrastructure not only on a national but maybe on a European scale as well. Geological conditions together with surface features favour intensive, secondary and anthropogenically conditioned erosion processes. Already in the historical sources there are mentions about the disastrous consequences of torrential rainfalls in the Kazimierz Dolny region. In such conditions the torrential rainfall waters flow quickly down the gully bottoms of considerable inclinations, concentrating on the bottom of Grodarz river valley. As a result it may lead to flooding or silting of crops, the roads may be destroyed or silted and the properties completely flooded. Taking into account the natural and cultural values of Kazimierz Dolny and its surroundings, as well as the presence of the Kazimierz Landscape Park it is necessary to take urgent steps in order to limit the threats considerably.
Źródło:
Przegląd Geologiczny; 2006, 54, 9; 768-776
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The origin and development of a valley bottom gully in a small rangeland catchment : influences of land use in the growth model
Autorzy:
Gómez Gutiérrez, A.
Schnabel, S.
Lavado Contador, F.
Jariego García, A.
Powiązania:
https://bibliotekanauki.pl/articles/294651.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully erosion
aerial photographs and orthophotographs
land use and vegetation cover
Opis:
In the present paper, 8 aerial orthophotographs were used for analysing the evolution of a valley bottom gully and its relationship with land use and vegetation cover in SW Spain. In addition, the growth model observed was compared with the literature. Results showed an increase in the area affected by gullying during the period by 314 m2 and a clear relationship between the areas affected by gullying and land use intensity was found.
Źródło:
Landform Analysis; 2011, 17; 65-70
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morfologia i etapy rozwoju parowu w Uściu koło Chełmna
Morphology and stages of gully development in Uść near Chełmno
Autorzy:
Jaworski, T.
Juśkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/294518.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
parów
debrza
spłukiwanie
Basen Unisławski
Dolina Dolnej Wisły
gully
ravines
sheet wash
Unisław Basin
Lower Vistula Valley
Opis:
W artykule przedstawiono wyniki badań geomorfologicznych parowu wykształconego na zboczach Basenu Unisławskiego w Uściu koło Chełmna oraz badań sedymentologicznych osadów występujących w jego dnie i na stożku napływowym. Formy te rozwinęły się w kilku etapach, co zostało udokumentowane wynikami badań cech strukturalno-teksturalnych osadów oraz datowań OSL. Badania te wykazały, że parów jest wykształcony w dnie peryglacjalnej doliny denudacyjnej z czasu późnego glacjału, która była następnie pogłębiona w młodszej fazie okresu atlantyckiego (ok. 6–5 ka BP).
This paper presents results of geomorphological analysis of alluvial fan and gully situated on the slope of the Unisław Basin (Lower Vistula Valley) in Uść near Chełmno as well as results of sedimentological analysis of deposits in these forms. The gully and alluvial fan near Uść were developed in few stages which are confirmed by structural and textural properties of their sediments and by results of OSL dating. Studies have shown that gully was created in the bottom of the denudation valley from Late Glacial, that was deepened later in the younger phase of the Atlantic period (ca 6–5 ka BP).
Źródło:
Landform Analysis; 2013, 25; 13-20
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Sampling Spacing on the Accuracy of Volume of a Medium-Size Gully
Autorzy:
Jun, Luo
Bin, Zhang
Du, Zhengpin
Zheng, Jilin
Liu, Hui
Qin, Fachao
Deng, Qinchun
Powiązania:
https://bibliotekanauki.pl/articles/123269.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
three modes
sampling spacing
gully volume
gully cross-section
Opis:
Accurate morphological parameters are key to understand the process and mechanism of gully erosion, but little information exists regarding the accuracy of gully volume influenced by sampling spacing. In order to assess the influence of sampling spacing on volume of medium gully under the condition of different shapes of gully cross-sections, as well as to provide information for proposed surveys, a MultiStation was utilized to obtain the point cloud of a Uand V-shaped gully. The coordinates were subsequently rarefied to a certain sampling spacing, and the gully volumes of three modes (Mode 1 only including rarefied terrain points; Mode 2 including detailed terrain and rarefied terrain points; Mode 3 including the rarefied detailed terrain points and terrain points with a given sampling spacing) were calculated in ArcGIS. The results showed that the error of gully volume increased non-monotonously with sampling spacing increased, and that the detail points had greater influence on the gully volume of a U-shaped than a V-shaped gully. As to Mode 1 and 2, the relative error (RE) of U-shaped gully volume increased faster with sampling spacing increasing, and presented high positive correlation. However, in the case of a V-shaped gully, a middle positive correlation for Mode 1 can be observed, and the RE was below 3% for Mode 2. For Mode 3, an increase in the sampling spacing of the terrain led to the larger RE, average RE, and variance of absolute error. If extremely high accuracy (2.5% of RE) is required, sampling spacing is less than 0.5 m; if high accuracy (5% of RE) is set, the sampling spacing of terrain points is below 0.8 m for a U-shaped gully, while the corresponding sampling spacing of terrain points and detail points are 2.0 m and 1.85 m, 3.0 m and 1.80 m, and 4.0 m and 0.75 m for a V-shaped gully. The shape of the gully’s cross-section, as well as the exact location of the shoulder line will affect the accuracy of the gully’s volume. This study will increase the efficiency of detail survey in the field for medium gully.
Źródło:
Journal of Ecological Engineering; 2019, 20, 11; 109-121
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stacjonarne badania procesów egzogenicznych w strefie brzegowej Zbiornika Brackiego (południe Syberii Wschodniej)
Egzogenic processes on shoreline of Brack Reservoir : stationary researches (South Part of East Siberia)
Autorzy:
Kaczmarek, H.
Mazaeva, O. A.
Kozyreva, E. A.
Khak, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/295168.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
procesy egzogeniczne
strefa brzegowa
procesy abrazyjno-akumulacyjne
ruchy masowe
osuwiska
sufozja
erozja wąwozowa
egzogenic processes
shoreline
accumulation-abrasion processes
mass movement
landslides
piping
karst process
gully erosion
Brack Reservoir
Opis:
Strefa brzegowa Zbiornika Brackiego na rzece Angarze jest niezwykle ciekawym przykładem złożonego kompleksu procesów egzogenicznych z wyraźnym wpływem antropopresji, będącej wynikiem utworzenia zbiornika wodnego i jego eksploatacji. Badania monitoringowe, rozpoczęte jeszcze przed utworzeniem zbiornika, wskazują na transformację i intensyfikację przebiegu procesów egzogenicznych zachodzących na tym obszarze przed utworzeniem zbiornika (procesy osuwiskowe, procesy krasowe, erozja linijna), objęcie nimi kolejnych terenów, wcześniej pasywnych, jak również pojawienie się procesów nowych, przedtem nie występujących w tym regionie (procesy eoliczne, procesy abrazyjno-akumulacyjne). Badania te prowadzone są przez pracowników Instytutu Skorupy Ziemskiej RAN, a od kilku lat, w ramach dwustronnych umów, uczestniczą w nich również pracownicy Instytutu Geografii i Przestrzennego Zagospodarowania PAN.
The Brack Reservoir on Angara river was created in 1967. It is the second in terms of capacity (170 km3) and surface (5,500 km2) man-made lake on Earth. Monitoring tests, that started before the reservoir has been created, gives the information about transformation and intensification of exogenous processes occurring in this area, in comparison to state before reservoir creation (landslides, karst, erosion processes). Those processes have taken new areas. Additionally on this area new processes have appeared as result of reservoir exploitation (eolian processes, accumulation-abrasive processes).
Źródło:
Landform Analysis; 2012, 20; 51-63
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rates of gully erosion along Pikes Peak Highway, Colorado, USA
Autorzy:
Katz, H. A.
Daniels, J. M.
Ryan, S. E.
Powiązania:
https://bibliotekanauki.pl/articles/294701.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gully erosion
roads
mountains
hillslopes
Opis:
Pikes Peak Highway is a partially paved road between Cascade, CO and the summit of Pikes Peak (4300 meters). Significant gully erosion is occurring on the hillslopes due to the concentration of surface runoff along the road surface and adjacent drainage ditches. As a result, large quantities of sediment are transported to the surrounding valley stream networks causing significant damage to riparian, wetland, and aquatic environments. This study addresses the rates of gully erosion along the Pikes Peak Highway.
Źródło:
Landform Analysis; 2011, 17; 75-80
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of gully erosion using the SIMWE model and GIS
Autorzy:
Koko, Š.
Powiązania:
https://bibliotekanauki.pl/articles/294699.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
simulation
gully erosion
SIMWE
r.landscape.evo
modeling
GIS
Opis:
Current soil erosion models do not solve the impact of gully erosion on the landscape changes but only its spatial distribution and intensity. Distributed process-based model SIMWE (Mitas & Mitasova 1998) and landscape evolution module (Burton et. al. 2010) was used for simulation of gully erosion consequences in GIS environment. The results of simulation within the assigned initiation condition in the past showed the real situation at the present time. Simulation process corresponded with the theoretical knowledge about gully development. Modification and combination of selected module procedure and of erosion model has shown the potential of the presented method to predict effectively the genesis of gullies.
Źródło:
Landform Analysis; 2011, 17; 81-86
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erozja wąwozowa zapisana w odsłanianych korzeniach drzew na Wysoczyźnie Proboszczowickiej pod Górą Św. Anny
Gully erosion recorded in anatomical changes in exposed roots in permanent gullies (southern Poland)
Autorzy:
Malik, I.
Powiązania:
https://bibliotekanauki.pl/articles/2074442.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
erozja wąwozowa
intensywność erozji
analiza dendrologiczna korzeni
datowanie epizodów erozyjnych
permanent gullies
gully erosion
exposed roots
tree rings
extreme rainfall events
Opis:
Erosion occurs in permanent gullies cutting into the undulating loess plateau in southern Poland. The gully slopes are mainly vegetated with beech trees as opposed to the surface of the plateau summit, which is cultivated agricultural land, devoid of forests for at least 18 centuries [od 18 wieków czy od XVIII wieku – czyli “since 1700s”?]. Beech roots are exposed in the gullies through erosion. Wood cells in the tree rings divide into early wood and late wood and, after the roots are exposed, also start to make fewer cells. In the roots on the border between exposed and unexposed tree rings in the tree roots, scars sometimes occur. This is an effect produced by corrasion by dolomites and limestones lying under the loess cover and re-deposition of building material stored by people in the higher part of the gullies. These anatomical changes in root tree rings allow one to date erosion episodes. Dating of the exposure of roots indicates that intensive erosion took place in the gullies starting in the 1980s. Since that time, numerous extreme rainfall events responsible for initiating erosion have also occurred. They contribute to deepening valleys causing new incisions to develop on hillslopes and headcut retreat in upper parts of the valleys studied at theWysoczyna Proboszczowicka near Góra św. Anny. The bottom of the valley head eroded during extreme rainfall events in 1984 and 1991. Erosion here alternates with deposition, its speed being relatively small. Incisions in hill slopes retreated during the flood in 1997, but they originated during earlier rainfall episodes. Such incisions retreat 2.5–3 m/year, i.e., relatively fast.
Źródło:
Przegląd Geologiczny; 2006, 54, 4; 326-332
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 42

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