Łukasz Wiejaczka

Polish Academy of Sciences, Institute of Geography and Spatial Organization · Department of Geoenvironmental Research

In this study, we analyzed the relationship between how a community views reservoir construction and the plan for local development around it. Specifically, we focused on the social perception of the Mucharz reservoir in Poland. The research hypothesis assumed that residents’ expectations of socioeconomic development around the reservoir dam determ...

This study presents an analysis of the influence of climatic conditions and the operation of a dam reservoir on the occurrence of ice cover and water temperature in two rivers (natural and transformed by reservoir operations) located in the Carpathian Mountains (central Europe). The analyses are based on data obtained from four hydrological and two...

This study illustrates the temporal dynamics of tourism development in a peripheral region of Northeast India (Cherrapunjee area) with an extreme rainfall. The analysis indicates that tourism development has accelerated in the last two decades as a result of the administrative opening of Meghalaya State and the dynamic development of tourism throug...

This study presents the characteristics of the current course of the phenomenon of droughts and floods in the catchment area of a man-made mountainous reservoir and forecasts of water inflow changes to the reservoir over the next three decades. The catchment area of the Klimkówka reservoir on the Ropa River, a tributary of the Wisłoka River, locate...

This paper is an introduction to a collection of nine studies that are intended to fill the gap in the literature associated with landform development and landscape changes related to natural forces and human activities in the Central European Mountains and their close forelands. The papers are grouped into four general categories that describe the...

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Purpose Agricultural land use associated with intensification in plant growing affects the physicochemical parameters of soils and thus soil quality. The aim of this study was to identify the quality of soils in the Peshok catchment in the Eastern Himalayas under different types of land use (tea, horticulture, rice), under high monsoon rainfall con...

The purpose of the paper is to examine and compare the visions of social and economic development in the area around the newly constructed Mucharz dam reservoir on the Skawa River in southern Poland as represented by both the local community and local authorities. A text mining approach was used to analyse both the information collected through int...

The study compares the quality of the habitats of mountain streams in sections without visible human integration and those permanently transformed by human activity between mountain areas in different climate zones. Three mountain streams with small catchments (10–20 km ² ) characterized by different natural conditions were selected for the researc...

Three pairs of small, fourth- to sixth-order catchments (approximately 5–80 km2), draining the margin of the Darjeeling Himalayas into the piedmont, were selected for a comparison of the land-use impact on the morphology and sedimentology of their stream channels. Each pair experienced similar annual rainfall and comprised similar metamorphic bedro...

The aim of the analysis was to compare physicochemical parameters and chemical composition of two groups of artificial reservoirs, mountain and lowland ones, characterised by different parameters and functions. Three mountain artificial reservoirs (Klimkówka, Dobczyce, Czorsztyn) located in the Upper Vistula basin (Carpathian Mountains in Poland) a...

The research focuses on the perception of the Mucharz reservoir in relation to costs and benefits for two types of communities. The primary aim of the paper is to compare the social impact of dam projects among both resettled and non-resettled local communities. The secondary aim of the paper is to test multivariate analysis of variance (MANOVA) as...

The content of 19 metals (chromium, cobalt, nickel, strontium, arsenic, magnesium, barium, cesium, gallium, rubidium, uranium, vanadium, zinc, lead, copper, cadmium, iron, manganese, and aluminum) in sediment in three ephemeral streams (Nahal Sansana, Nahal Revivim and Nahal Pura) with reservoirs in the Negev Desert is studied herein. The study was...

This study presents an assessment of factors that influence how people who live in the vicinity of dams view such projects. The usefulness of the principal component analysis (PCA) method for identifying variables that determine individuals' opinion about large dam projects was reviewed. The study focuses on people affected by the construction of t...

The subtropics within the monsoonal range are distinguished by intensive human activity, which affects stream water chemistry. This paper aims to determine spatio-temporal variations and flowpaths of stream water chemical elements in a long-term anthropogenically-modified landscape, as well as to verify whether the water chemistry of a subtropical...

Evolution of the bluffs within the shore zone of a reservoir is dependent on many environmental factors. In this study, a characterization of bluffs was presented with reference to the entire shore zone of a mountain reservoir. The research was conducted on the Czorsztyn reservoir – one of the largest functioning reservoirs within the Polish Carpat...

The article presents the spatial and temporal dynamics of water temperature in two reservoirs on the upper course of the Dunajec River in the Polish Carpathians. It aims at presenting how spatial patterns and time evolution of water temperature in the reservoirs affect the water temperature in the river. The analysis is based on the results of wate...

The present study focuses on the Balason river running through the Himalayan piedmont zone (near Siliguri, India). The objective of the study is an assessment of the environmental effects of river bed material extraction by humans and the dependence of indigenous people on the river and its ecosystem services. The analysis is based on results of fi...

We researched local residents' perceptions of a dam and reservoir construction project in the Teesta River catchment basin (Darjeeling Himalayas) within 1.5 years of its completion, using a questionnaire survey. Most survey participants expressed negative perceptions of the project, citing a declining quality of life (loss of jobs and loss of acces...

The article presents the role of the newly built reservoir in the formation of the hydrochemistry of water of the Teesta River (a tributary of the Brahmaputra) in its Himalayan course. Field research were performed in the post-monsoon season of the period 2013-2015. Sampling and measuring points were located in five points over 43 km of the Teesta...

The article presents the evolution of water temperature changes in the Wisłok river (the upper Vistula basin) as an effect of Besko reservoir, existing since 1978, with a capacity of 15 million m3. The thermal effect of this small Carpathian reservoir is compared to that of larger reservoirs located in the region. As has been found in the analysis,...

Functioning of retention reservoirs leads to changes in valley morphology due to abrasion and accumulation processes. These processes are conditioned by hydrodynamic reservoir activity, which are revealed by water level fluctuation and wind waves on the reservoir. The most noticeable morphological changes within reservoirs include shoreline abrasio...

In a changing climate with a warming trend in air temperature, river water temperature increases as a result of heat exchange with the atmosphere. Moreover, of the different types of anthropogenic activity impacting rivers, the construction of dams appears to have multi-dimensional effects on the river environment, and it especially affects the the...

Extremely high precipitation is characteristic of the frontal zone of the Himalaya. In this article we study tributaries which supply huge sediment loads to the Teesta river in the Darjeeling Himalaya, India and significantly affect transportation regime downstream the junction of the Great Rangit with the main river. The material supply is also co...

Extreme hydro-meteorological event disrupt the balance of natural systems, such as river channels. This paper focuses on changes in mountain valleys associated with a hydro-meteorological event that occurred in the Polish Carpathian Mountain in May and June of 2010. On three rivers (Ropa river, Bielanka and Bystrzanka streams) the geomorphological...

This study analyzed the temporal and spatial changes in land use taking place in two adjacent river valleys, located within the Polish Carpathians. The land use in 1977 and 2009 was presented for selected areas. In one of the valleys, a dam has been operating since 1994 along with a retention reservoir, which is an additional factor influencing the...

The hydromorphological state and habitat quality of the selected streams in the Negev Desert was taken under consideration in the paper. Field studies were conducted in September 2014 on selected 500 m sections of streams (Nahal Be’er Sheva, Nahal Hebron) characterized by noticeable anthropopressure as well as on streams (Nahal Sansana, Nahal Yatir...

The aim of the analysis was to demonstrate the role of reservoirs in shaping nutrient content (nitrates NO3⁻ and phosphates PO4³⁻ as well as ammonia NH4⁺) in the waters of mountain rivers. Three Carpathian rivers with reservoirs in their courses were selected for the study: the Ropa River (Klimkowka reservoir), the Dunajec River (the Czorsztyn-Srom...

A thermal regime of aquatic ecosystems determines the possibility of survival and development of aquatic biota. Thermal stratification of river water impounded by dam reservoirs can cause a permanent disturbance in the naturally existing water-air temperature relationship downstream of reservoirs. This article aims at determining the role of dam re...

The study determines the scale and direction of changes in the riverbeds level within the Darjeeling Himalaya and its foreland, due to overlapping of natural and anthropogenic factors. The analysis is based on the monitoring conducted in the period 2011–2014. Three adjacent rivers, the Lish, Gish and Chel, were selected for the study, tributaries o...

Changing the position of the river channel bed is one of the more visible morphological processes in mountain areas. The analysis of the dynamics of the position of river channel beds (rivers: Ropa, Zdynia, Wislok) located in the Polish Carpathians is presented. The different indicators relating to the course of long-term daily water stages (1997-2...

The article analyses the natural relationship between conductivity and water temperature in a river as well as changes in the particular relationship between those variables caused by a reservoir. The analysis is based on daily measurements of conductivity and water temperature recorded over a period of many years (1982-2005). The measurements were...

The main objective of the paper is to determine the role of mountain reservoirs in shaping the dominant cyclicity and energy of river flows. The paper compares a large complex composed of two reservoirs (Czorsztyn–Sromowce Wyżne) with a smaller reservoir (Besko). These reservoirs are located in the Polish Carpathians and are characterised by very d...

The main objective of this paper was to demonstrate the changes in the natural thermal regime of the middle course of the Dunajec River, caused by the construction of the reservoir complex in the villages of Czorsztyn and Sromowce Wyżne 1994-1997. The analysis is based on water temperature measurements conducted in the river longitudinal profile, f...

This article contains an analysis of the hydromorphological state of mountain streams under contemporary human impact conditions. The subjects of the study are the Jaszcze and Jamne streams, located in the Polish Flysch Carpathians. The hydromorphological state of each stream reflects its habitat quality and depends on a number of natural and anthr...

The article presents the results of an assessment of the hydromorphological state of selected Carpathian rivers in sections above and below the reservoirs. An attempt has also been made to assess the impact of reservoirs on the hydromorphological conditions and quality of river habitats. The research was based on the River Habitat Survey (RHS) meth...

The paper outlines changes in the channel morphology of the Ropa riverbed over the last six years, taking into account the role of large floods and the Klimkówka water reservoir in shaping the morphology of the riverbed. The analysis was based on annual geodetic measurements of the Ropa riverbed conducted between 2009-2014. The research was carried...

This article presents the results of a survey on how people perceive the Klimkówka storage reservoir located on the Ropa River in the Polish Carpathians. The analysis focused on establishing the role of various factors which impact the assessment of the reservoir by the local community. Community perception of the reservoir was analyzed in relatio...

The aim of the present study is to evaluate the hydromorphological state (the degree of naturalness and anthropogenic transformation) of Himalayan rivers and to determine the role of human activity in shaping their hydromorphology. The study was conducted in the valley of the Tista River in Darjeeling Himalaya. The field research was carried out in...

The article presents the changes in the physicochemical properties (temperature, conductivity and pH) of the water in the Ropa River in the Polish Carpathians that were caused by the Klimkówka Reservoir, which was commissioned for operation in 1994. The study uses data mainly from daily measurements of the physicochemical properties of the water in...

Extreme rainfall occurred in the Polish Flysch Carpathians in May and June 2010. At the Research Station in Szymbark total of rainfall in May 2010 was 224% of long-term average monthly total for May and 25% of average annual total of rainfall. Four-day rainfall total was 375.5 m, with a daily maximum sum of 107.0 mm, maximum intensity of 28 mm/h an...

This article compares the observed water level changes during a hydrological year, in the two Carpathian reservoirs: the Besko and the Klimkówka. The analyzed reservoirs are located within the same physico-geographical unit - the Low Beskids, but the reservoirs operate on rivers with different hydrological regimes (the Wisłok River and the Ropa Riv...