Scale Dependency of Hydrological Characteristics in the Upper Ping River Basin, Northern Thailand

2007 ◽  
pp. 67-74 ◽  
Author(s):  
Koichiro Kuraji ◽  
Kowit Punyatrong ◽  
Issara Sirisaiyard ◽  
Chatchai Tantasirin ◽  
Nobuaki Tanaka
Keyword(s):  
River Basin ◽  
Scale Dependency ◽  
Northern Thailand ◽  
Hydrological Characteristics

Systems analysis of urban wastewater systems – two systematic approaches to analyse a complex system

2005 ◽  
Vol 52 (12) ◽  
pp. 171-179 ◽  
Author(s):  
L. Benedetti ◽  
F. Blumensaat ◽  
G. Bönisch ◽  
G. Dirckx ◽  
N. Jardin ◽  
...  
Keyword(s):  
River Basin ◽  
Systems Analysis ◽  
Scale Dependency ◽  
Urban Wastewater ◽  
Critical Pathways ◽  
Capital Costs ◽  
River Stretch ◽  
Basin Scale ◽  
Wastewater Systems ◽  
Receiving Water

This work was aimed at performing an analysis of the integrated urban wastewater system (catchment area, sewer, WWTP, receiving water). It focused on analysing the substance fluxes going through the system to identify critical pathways of pollution, as well as assessing the effectiveness of energy consumption and operational/capital costs. Two different approaches were adopted in the study to analyse urban wastewater systems of diverse characteristics. In the first approach a wide ranged analysis of a system at river basin scale is applied. The Nete river basin in Belgium, a tributary of the Schelde, was analysed through the 29 sewer catchments constituting the basin. In the second approach a more detailed methodology was developed to separately analyse two urban wastewater systems situated within the Ruhr basin (Germany) on a river stretch scale. The paper mainly focuses on the description of the method applied. Only the most important results are presented. The main outcomes of these studies are: the identification of stressors on the receiving water bodies, an extensive benchmarking of wastewater systems, and the evidence of the scale dependency of results in such studies.

scholarly journals Evaluation of Future Climate and Potential Impact on Streamflow in the Upper Nan River Basin of Northern Thailand

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Miyuru B. Gunathilake ◽  
Yasasna V. Amaratunga ◽  
Anushka Perera ◽  
Imiya M. Chathuranika ◽  
Anura S. Gunathilake ◽  
...  
Keyword(s):  
River Basin ◽  
Minimum Temperature ◽  
Climate Models ◽  
Hydrological Modeling ◽  
Winter Season ◽  
Future Climate ◽  
Maximum Temperature ◽  
Monthly Precipitation ◽  
Northern Thailand ◽  
The Impact

Water resources in Northern Thailand have been less explored with regard to the impact on hydrology that the future climate would have. For this study, three regional climate models (RCMs) from the Coordinated Regional Downscaling Experiment (CORDEX) of Coupled Model Intercomparison Project 5 (CMIP5) were used to project future climate of the upper Nan River basin. Future climate data of ACCESS_CCAM, MPI_ESM_CCAM, and CNRM_CCAM under Representation Concentration Pathways RCP4.5 and RCP8.5 were bias-corrected by the linear scaling method and subsequently drove the Hydrological Engineering Center-Hydrological Modeling System (HEC-HMS) to simulate future streamflow. This study compared baseline (1988–2005) climate and streamflow values with future time scales during 2020–2039 (2030s), 2040–2069 (2050s), and 2070–2099 (2080s). The upper Nan River basin will become warmer in future with highest increases in the maximum temperature of 3.8°C/year for MPI_ESM and minimum temperature of 3.6°C/year for ACCESS_CCAM under RCP8.5 during 2080s. The magnitude of changes and directions in mean monthly precipitation varies, with the highest increase of 109 mm for ACESSS_CCAM under RCP 4.5 in September and highest decrease of 77 mm in July for CNRM, during 2080s. Average of RCM combinations shows that decreases will be in ranges of −5.5 to −48.9% for annual flows, −31 to −47% for rainy season flows, and −47 to −67% for winter season flows. Increases in summer seasonal flows will be between 14 and 58%. Projection of future temperature levels indicates that higher increases will be during the latter part of the 20th century, and in general, the increases in the minimum temperature will be higher than those in the maximum temperature. The results of this study will be useful for river basin planners and government agencies to develop sustainable water management strategies and adaptation options to offset negative impacts of future changes in climate. In addition, the results will also be valuable for agriculturists and hydropower planners.

scholarly journals Assessment of Anthropogenic Factors Impact On Annual and Seasonal Runoff in the Belaya River Basin

2014 ◽  
pp. 119-126
Author(s):  
Keyword(s):  
Statistical Methods ◽  
River Basin ◽  
Annual Runoff ◽  
Anthropogenic Factors ◽  
Economic Activities ◽  
Hydrological Characteristics ◽  
Seasonal Runoff ◽  
Anthropogenic Alterations

Research of the runoff hydrological characteristics anthropogenic alterations in the Belaya River basin has been conducted with statistical methods. Assessment of the economic activities impact on the annual runoff value and assessment of the ponds’role in the within-year runoff redistribution has been carried out.

Hydrological impacts of land use/land cover change in a large river basin in central-northern Thailand

2010 ◽  
Vol 30 (13) ◽  
pp. 1917-1930 ◽  
Author(s):  
Pakorn Petchprayoon ◽  
Peter D. Blanken ◽  
Chaiwat Ekkawatpanit ◽  
Khalid Hussein
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Cover Change ◽  
River Basin ◽  
Large River ◽  
Land Use Land Cover ◽  
Northern Thailand ◽  
Hydrological Impacts

scholarly journals Climate indicators of changes in hydrological characteristics (a case of the Psyol river basin)

2020 ◽  
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
Research Methods ◽  
River Basin ◽  
The State ◽  
Small Rivers ◽  
Medium Size ◽  
Water Runoff ◽  
Anthropogenic Pressure ◽  
Hydrological Characteristics

Formulation of the problem. A national climate program, complying with the Association Agreement between Ukraine and the EU, is aimed at long-term adaptation measures to climate change, providing for the development of legislation in the field of environmental protection, sectoral strategies, improving air and water quality. These measures require identification of climatic factors’ impact on hydrological characteristics of water bodies in any area in order to protect and improve them, as well as a comprehensive approach to the rational management of water resources. Analysis of previous research. Using mathematical models of atmospheric circulation allows us to obtain generalized calculations of the average global and regional air temperature, characterized by significant errors in case of different models. Problems of further research. Modern changes in climatic conditions in Ukraine are characterized by locality and rapidity: increasing number of anomalous atmospheric phenomena, frequency of droughts, dry winds which, according to preliminary estimates, may lead to reduction of water resources, changes in internal annual redistribution of water temperature and runoff against the background of increasing thermal resources of the territory. The purpose. The article analyses climatic indicators’ influence on the main hydrological characteristics on the example of the Psyol river basin within Ukraine. Research methods. Research methods are presented by statistical and cartographic analysis (correlation analysis method). The initial information is the results of observations contained in the State Climate Cadastre and the State Water Cadastre for the Dnieper Valley. Presentation of the main research material. Analysis of climate change in the Psyol river basin indicates a decrease in water consumption, both in the main river of the basin and in its main tributaries. In addition to changes in temperature and humidity, the reasons for this process were the shifts that occurred in the nature of the intra-annual distribution of the runoff. During the late XX – early XXI century the share of spring floods decreased due to the reduced period of ice phenomena and corresponding decrease in the thickness of the snow cover on the rivers. As a result, the most important component of the annual runoff of rivers began to decrease rapidly. The role of groundwater in the formation of water runoff increased against the background of a predominant decrease in precipitation. This is especially true for medium-size and small rivers, subject to significant anthropogenic pressure: over-regulation of channels, creation of artificial lakes, their shallowing. Practical value. Based on the main provisions of the national environmental policy of Ukraine on the use of water resources and the implementation of European principles of the Water Framework Directive 2000/60 / EC (ERVD) the study of changes in hydrological regime of rivers is of practical importance for sustainable management. Research results. The study of the impact of changes in climatic indicators on hydrological characteristics makes it possible to determine the reference conditions and classes of ecological status of rivers under conditions of anthropogenic pressure against the background of further changes in climatic indicators that will have different trends.

Hydrological characteristics of the Czerniejówka river basin

2011 ◽  
Vol 66 (2) ◽  
Author(s):  
Zdzisław Michalczyk ◽  
Stefan Bartoszewski ◽  
Sławomir Głowacki ◽  
Joanna Sposób
Keyword(s):  
River Basin ◽  
Hydrological Characteristics

Estimating hydrological characteristics in the Amu Darya River basin under climate change conditions

2011 ◽  
Vol 36 (10) ◽  
pp. 681-689 ◽  
Author(s):  
N. A. Agal’tseva ◽  
M. V. Bolgov ◽  
T. Yu. Spektorman ◽  
M. D. Trubetskova ◽  
V. E. Chub
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Hydrological Characteristics ◽  
Amu Darya ◽  
Amu Darya River

scholarly journals Understanding the Impacts of Climate Change in the Tana River Basin, Kenya

2018 ◽  
Vol 379 ◽  
pp. 37-42 ◽  
Author(s):  
Lal Muthuwatta ◽  
Aditya Sood ◽  
Matthew McCartney ◽  
Nishchitha Sandeepana Silva ◽  
Alfred Opere
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
River Basin ◽  
Assessment Tool ◽  
Swat Model ◽  
Baseline Period ◽  
Base Flow ◽  
Water Yield ◽  
Hydrological Characteristics ◽  
Tana River

Abstract. In the Tana River Basin in Kenya, six Regional Circulation Models (RCMs) simulating two Representative Concentration Pathways (RCPs) (i.e., 4.5 and 8.5) were used as input to the Soil and Water Assessment Tool (SWAT) model to determine the possible implications for the hydrology and water resources of the basin. Four hydrological characteristics – water yield, groundwater recharge, base flow and flow regulation – were determined and mapped throughout the basin for three 30-year time periods: 2020–2049, 2040–2069 and 2070–2099. Results were compared with a baseline period, 1983–2011. All four hydrological characteristics show steady increases under both RCPs for the entire basin but with considerable spatial heterogeneity and greater increases under RCP 8.5 than RCP 4.5. The results have important implications for the way water resources in the basin are managed. It is imperative that water managers and policy makers take into account the additional challenges imposed by climate change in operating built infrastructure.

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