scholarly journals Development Environments and Factors of Subsidence Dolines

Geosciences ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 513
Author(s):  
Márton Veress
Keyword(s):  
Water Level ◽  
Climatic Factors ◽  
Anthropogenic Impacts ◽  
Subsurface Water ◽  
Anthropogenic Activity ◽  
Development Environment ◽  
Secondary Porosity ◽  
Water Influx ◽  
Dry Seasons ◽  
Favorable Conditions

This study describes the development environments of subsidence dolines based on literary data (development environments create favorable conditions for the local denudation of superficial deposit and thus, for the development of depressions). Development environments are the inclination of the bearing surface, the secondary porosity of the bedrock, the characteristics of the cover, water influx into the cover, karstwater and groundwater, melting permafrost, and anthropogenic activity. These may become optimal when controlled by various geological, geomorphological, and climatic factors. Development environments may be qualitative (there is doline development in case of its presence) and quantitative (doline development occurs in case of suitable quantitative values). The development environment groups of subsidence dolines are environment groups independent of water level, environment groups dependent on water level, and anthropogenic environment groups. In the case of an environment group independent of water level, surface morphology, cover characteristics, geomorphic evolution, and water supply are determining, while in case of an environment group dependent of water level, subsurface water level and its fluctuations and the characteristics of rainfalls interrupting dry seasons are crucial. Anthropogenic impacts mainly affect doline development through water balance.

Study on Prediction Model of Karstic Large Spring Water Level Dynamic Coupling Multiple Factors in Jinan

2015 ◽  
Vol 8 (1) ◽  
pp. 309-317 ◽  
Author(s):  
Xing Liting ◽  
Zhou Juan ◽  
Zhang Fengjuan ◽  
Wang Song ◽  
Dou Tongwen ◽  
...  
Keyword(s):  
Prediction Model ◽  
Water Level ◽  
Spring Water ◽  
Anthropogenic Factors ◽  
Karst Water ◽  
Multiple Factors ◽  
Factors Influencing ◽  
Heterogeneous Features ◽  
Dry Seasons ◽  
Natural Decay

In karst regions, due to the heterogeneous features of karst medium, the characteristics of the groundwater flow turn to be of high complexity. Researchers have been seeking proper forecasting methods for karst water dynamic for many years. This paper, taking the spring in Jinan as an example, using regression analysis, analyzed the factors influencing spring water dynamic, and quantitatively evaluated the influencing coefficients of spring water level concerning rainfall, exploitation and recharge as well as the natural decay coefficient of spring water in dry seasons. The prediction model coupling multiple factors was built by investigating natural and anthropogenic factors influencing groundwater level, which could be used for forecasting dynamic of spring water in Jinan. The calculated value of model was highly coincided with the observed value. In consideration of the characteristics of uneven precipitation in Jinan, the suitable zones and volume of artificial recharge were investigated finally, which could help to sustain the spewing of Jinan springs significantly.

scholarly journals Analysing the sensitivity of Hungarian landscapes based on climate change induced shallow groundwater fluctuation

2019 ◽  
Vol 68 (4) ◽  
pp. 355-372 ◽  
Author(s):  
Zoltán Zsolt Fehér ◽  
János Rakonczai
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
Water Resource ◽  
Climatic Factors ◽  
Shallow Groundwater ◽  
Subsurface Water ◽  
Groundwater Fluctuation ◽  
Current Parameter ◽  
Local Water ◽  
The One

One of the undoubtedly recognizable consequences of the ongoing climate change in Hungary is the permanent change of groundwater depth, and consequently the sustainably reachable local water resources. These processes trigger remarkable changes in soil and vegetation. Thus, in research of sensitivity of any specific landscape to the varying climatic factors, monitoring and continuous evaluation of the water resources is inevitable. The presented spatiotemporal geostatistical cosimulation framework is capable to identify rearrangements of the subsurface water resources through water resource observations. Application of the Markov 2-type coregionalization model is based on the assumption, that presumably only slight changes have to be handled between two consecutive time instants, hence current parameter set can be estimated based on the spatial structures of prior and current dataset and previously identified parameters. Moreover, the algorithm is capable to take into consideration the significance of the geomorphologic settings on the subsurface water flow. Trends in water resource changes are appropriate indicators of certain areas climate sensitivity. The method is also suitable in determination of the main cause of the extraordinary groundwater discharges, like the one, observed from the beginning of the 1980’s in the Danube–Tisza Interfluve in Hungary.

scholarly journals EFEK SUMUR RESAPAN TERHADAP PENGURANGAN VOLUME LIMPASAN PERMUKAAN

GANEC SWARA ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 537
Author(s):  
I WAYAN YASA ◽  
SASMITO SOEKARNO ◽  
I DEWA GEDE JAYA NEGERA
Keyword(s):  
Land Use ◽  
Ground Water ◽  
Water Level ◽  
Empirical Model ◽  
Soil Texture ◽  
Ground Water Level ◽  
Subsurface Water ◽  
Drying Up ◽  
Rain Data ◽  
Made In

Changes in land use not only affect the hydrological component, but also have an impact on the environmental sector, which include increasing the frequency of flooding and inundation, decreasing the availability of subsurface water, and drying up community wells. Various attempts have been made in efforts to reduce flooding and maintain sources of subsurface water, for example by applying infiltration well technology in each settlement. Infiltration wells will be able to function to re-enter rainwater falling on the pavement and can reduce flooding and inundation. This research is conducted with an empirical model that is connecting the amount of runoff that occurs after the availability of recharge wells. The purpose of this research is to get the ability of infiltration wells to reduce the occurrence of flooding in an area. The data used in the analysis are rain data and soil texture data. Based on the analysis results obtained dimensions of 0.8 m, 1 m and 1.2 m infiltration wells with a depth of 2 m. The depth of ground water level is 1.94 m, the permeability value (k) of land is 0.24 x 10ˉ⁴ m / sec. From each of the infiltration well diameters, it can reduce the successive runoff namely; infiltration wells are 0.8 m in diameter from runoff of 0.479 m³ / sec and after an infiltration well is reduced to 0.057m³ / sec, infiltration wells diameter 1.2 from runoff is 0.401 m³ / sec and after an infiltration well is reduced to 0.0475 m / second, and in the diater infiltration well 2 m from runoff of 0.377 m³ / sec and after the infiltration well is reduced to 0.0571 m / sec.

Tackling rainwater shortages during dry seasons using a socio-technical operational strategy

2015 ◽  
Vol 15 (5) ◽  
pp. 974-980 ◽  
Author(s):  
Tulinave B. Mwamila ◽  
Mooyoung Y. Han ◽  
Tschung-il Kim ◽  
Preksedis M. Ndomba
Keyword(s):  
Water Level ◽  
Rainwater Harvesting ◽  
Dry Season ◽  
User Cooperation ◽  
Operational Strategy ◽  
Daily Water ◽  
Dry Seasons ◽  
Current Value ◽  
Level Monitoring ◽  
Water Level Monitoring

The management of water resources during the dry season is a major challenge associated with rainwater harvesting (RWH) technology, but is necessary given the human suffering that follows from resulting conditions of water scarcity. In this study, the parameters for dry season assessment are defined in terms of ‘no water days’ (NWD) and rainwater usage ratio. A simple socio-technical operational strategy making use of a water level monitoring system is proposed for NWD reduction. This involves water level monitoring, whereby daily water demand varies with user cooperation, as based on the available water in a tank. The results of our study show that an NWD as low as 10 can be achieved as compared with the current value of 115 days, before considering investment on additional roof catchments and tank volume. These parameters are useful for analyzing any type of rooftop RWH system. Furthermore, this operational strategy can be made practical and simplified by incorporating an easily visible and understood guideline onto the RWH system. This strategy is replicable anywhere in the world, with consideration of site-specific conditions such as rainfall amounts, roof sizes, and population.

Assessment of water levels and the effects of climatic factors and catchment dynamics in a shallow subtropical reservoir, Manjirenji Dam, Zimbabwe

2018 ◽  
Vol 10 (3) ◽  
pp. 580-590 ◽  
Author(s):  
Beaven Utete ◽  
Tamuka Nhiwatiwa ◽  
Blessing Kavhu ◽  
Samuel Kusangaya ◽  
Nyashadzashe Viriri ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Climatic Factors ◽  
Integrated Water Resources Management ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Management Approach ◽  
Aquatic Communities ◽  
Resources Management ◽  
Conservation Implications

Abstract Natural water level fluctuations have associated effects on water quality and resident aquatic communities, although their impacts are magnified if the dams have other non-seasonal designated multiple uses. Research demonstrates that excessive water level fluctuations impair ecosystem functioning, ultimately leading to shifts between clear-water and turbid states in shallow lakes. However, these data lack for Manjirenji Dam in Zimbabwe, thus hampering efforts towards effective freshwater resources management in the shallow reservoir. This study analyzed water levels and their fluctuations, and assessed the effects of climatic factors and catchment dynamics using a combination of historical and remote sensed data for the shallow Manjirenji Dam in Zimbabwe. Time series and multiple regression analysis were used to determine water level trends, and the influence of catchment and climatic components in Manjirenji Dam. Lake levels have increased since construction, though their non-significant seasonal variation in the Manjirenji Dam reflects the overlapping effects of catchment and climatic variables. Despite the inferred high stability and resilience, the high fluctuation widths expose the dam to hydrodynamic and climate shocks which have major ecological and conservation implications. A climate change based integrated water resources management approach is necessary for sustainable water resources utilisation in the Manjirenji Dam.

scholarly journals A Geographical Approach to Water Resource Mapping for Atlases

2020 ◽  
Vol 13 (2) ◽  
pp. 96-103
Author(s):  
Leonid M. Korytny ◽  
Olga V. Gagarinova ◽  
Elena A. Ilyicheva ◽  
Natalya V. Kichigina
Keyword(s):  
Water Resource ◽  
Water Resource Management ◽  
Anthropogenic Impacts ◽  
Atmospheric Precipitation ◽  
Subsurface Water ◽  
Water Runoff ◽  
Water Protection ◽  
Flood Hazards ◽  
Protection Measures ◽  
Resource Mapping

We examine water resource mapping as an important component of the geographical approach in land hydrology and in the water sector which serves to assist considerably in dealing with water problems and water resource management. We suggest that seven groups of water resource maps be distinguished: introductory maps, maps of formation of surface and subsurface water regimes, maps of assessments of water resource potential, maps of water management, maps of anthropogenic impacts on water, maps of hazardous hydrological phenomena and maps of water protection measures. Characteristic properties water resource mapping for atlas products are identified using a case study of territory surrounding Lake Baikal as a site of global significance. We compiled an inventory of water resource themes covered by various atlases of the Baikal region and determined gaps relating to economic aspects of water and to maps on water protection. Limitations of the traditional isoline method in geographical water resource mapping are shown. At hillslope level where atmospheric precipitation transforms to surface runoff further to stream flow, it is recommended that the indication localization method be used, which is based on interdependencies of components of the geosystem. Water runoff mapping at the regional level in the hydrographic network uses the technique of long-channel (epure) mapping based on tools of structural hydrographic and Horton-Strahler classification. A technique of regionalization is described for flood hazards, water protection and recreation zoning of Baikal’s shores as well as cartographic modeling of processes in the Selenga river delta.

scholarly journals Wahania poziomów wody jezior w Polsce w latach 1956–2015 = Water-level fluctuations in Polish lakes in the 1956–2015 period

2020 ◽  
Vol 92 (1) ◽  
pp. 41-54
Author(s):  
Adam Choiński ◽  
Jerzy Jańczak ◽  
Ptak Mariusz
Keyword(s):  
Water Resources ◽  
Water Level ◽  
Climatic Factors ◽  
Kendall Test ◽  
Climatic Conditions ◽  
Water Levels ◽  
Water Level Fluctuations ◽  
Anthropogenic Factors ◽  
Local Conditions ◽  
Study Results

Water-level fluctuations are among the primary factors determining the functioning of lakes. The volume to which lake basins are filled with water is of major importance to the courses of many processes and phenomena. A particular amount of water in a lake, and water-table stability, are also important from the point of view of human activity, as these elements help determine the quantity and accessibility of the water resources lakes have to offer, and therefore the possibilities for them to be used by different branches of the economy, e.g. industry, agriculture or tourism. The work detailed here is thus a presentation of trends as regards water-level fluctuations in 16 lakes in Poland, over the period 1956–2015. The study results, obtained for the first time in relation to such a long time scale and extending to around a dozen lakes, aim to point to the scale and direction of water-level fluctuations in times of the intensive transformation of the natural environment. They were obtained by reference to water-level observations made by the Institute of Meteorology and Water Management – National Research Institute (IMiGW-PIB). Specifically, data referring to the (November-October) hydrological year were analysed for trends as regards mean annual water levels using the Mann-Kendall test. Results point to major variability in the courses noted for these levels over the analysed multiannual period. Nevertheless, three overall situations could be designated from within the group of cases analysed, i.e. increase, decrease or lack of a trend. The first group includes Lakes Sławskie, Jamno, Łebsko, Nidzkie, and Studzieniczne (where increases were statistically significant at p=0.05); the second, Lakes Ostrzyckie and Ełckie (decreases significant at p=0.05); and the last group all remaining lakes, i.e. Charzykowskie, Jeziorak and Rajgrodzkie, Biskupińskie, Drwęckie and Białe, Gopło, Roś, and Wigry. It was, however, noted that in many cases analysed periods of alternating increase and decrease in water level were to be observed. The causes of such fluctuations were complex, but inter alia reflected droughts of several years’ duration, periods featuring higher-than-average precipitation, and local conditions. In general, water-level fluctuations in lakes result from natural and anthropogenic factors determining the hydrological conditions in catchments. And in the context of the lakes considered here, the courses of water-level fluctuations were mostly a reflection of local, rather than wider climatic conditions – a fact i.a. illustrated by the lack of cohesive regional designations. The situation is different from that of, for example, the thermal or ice regimes of Polish lakes, in relation to which observed similarities in properties are seen to be determined mainly by climatic factors. Information of this kind may be of key importance to the (quantitative and qualitative) management of water resources in the context of the climate change being observed currently.

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