Hydrological Modeling of Spatial and Temporal Changes of Blue and Green Water Resources in the Zayandeh Rud River Basin

2020 ◽  
pp. 141-173
Author(s):  
Ali Asghar Besalatpour ◽  
Gholam Hossein Heydarpour ◽  
Abbass Kazemi ◽  
Amir Hossein Aghakhani Afshar
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Hydrological Modeling ◽  
Temporal Changes ◽  
Green Water ◽  
Spatial And Temporal Changes

scholarly journals Anthropic transformation in the Gurupi river basin, eastern Amazon

2019 ◽  
Vol 10 (3) ◽  
pp. 212-235
Author(s):  
Fabiana da Silva Pereira ◽  
Ima Célia Guimarães Vieira
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Cover Change ◽  
River Basin ◽  
Forest Cover ◽  
Temporal Changes ◽  
Amazon Region ◽  
Digital Data ◽  
Forest Protection ◽  
Spatial And Temporal Changes

The objective of this paper was to evaluate the degree of anthropic transformation of a river basin in the Amazon region. We used the digital data of the TerraClass Project to calculate the Anthropic Transformation Index - ATI. In order to verify spatial and temporal changes along a decade in the Gurupi river basin, we used the database of the years 2004 and 2014. The results showed an increase of anthropic changes in the basin over a decade, as a result of forest cover conversion into agricultural and pastures areas. Although the Gurupi river basin remains at a regular level of degradation after a decade, the intensification of land use and land cover change is a threat to the few rainforest remnants of the river basin, which can lead the region to the next level of degradation, if effective forest protection, conservation and restoration actions are not implemented in the region.  

scholarly journals Impacts of Climate and Land-Use Change on Blue and Green Water: A Case Study of the Upper Ganjiang River Basin, China

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2661
Author(s):  
Yongfen Zhang ◽  
Chongjun Tang ◽  
Aizhong Ye ◽  
Taihui Zheng ◽  
Xiaofei Nie ◽  
...  
Keyword(s):  
Land Use ◽  
Resource Management ◽  
Water Resources ◽  
Land Use Change ◽  
River Basin ◽  
Water Resource ◽  
Water Resource Management ◽  
Green Water ◽  
Precipitation Changes ◽  
Ganjiang River Basin

Quantitatively figuring out the effects of climate and land-use change on water resources and their components is essential for water resource management. This study investigates the effects of climate and land-use change on blue and green water and their components in the upper Ganjiang River basin from the 1980s to the 2010s by comparing the simulated changes in blue and green water resources by using a Soil and Water Assessment Tool (SWAT) model forced by five climate and land-use scenarios. The results suggest that the blue water flow (BWF) decreased by 86.03 mm year−1, while green water flow (GWF) and green water storage (GWS) increased by 8.61 mm year−1 and 12.51 mm year−1, respectively. The spatial distribution of blue and green water was impacted by climate, wind direction, topography, and elevation. Climate change was the main factor affecting blue and green water resources in the basin; land-use change had strong effects only locally. Precipitation changes significantly amplified the BWF changes. The proportion of surface runoff in BWF was positively correlated with precipitation changes; lateral flow showed the opposite tendency. Higher temperatures resulted in increased GWF and decreased BWF, both of which were most sensitive to temperature increases up to 1 °C. All agricultural land and forestland conversion scenarios resulted in decreased BWF and increased GWF in the watershed. GWS was less affected by climate and land-use change than GWF and BWF, and the trends in GWS were not significant. The study provides a reference for blue and green water resource management in humid areas.

scholarly journals Quantifying the Effect of Land Use Change and Climate Variability on Green Water Resources in the Xihe River Basin, Northeast China

2019 ◽  
Vol 11 (2) ◽  
pp. 338 ◽  
Author(s):  
Leting Lyu ◽  
Xiaorui Wang ◽  
Caizhi Sun ◽  
Tiantian Ren ◽  
Defeng Zheng
Keyword(s):  
Land Use ◽  
Water Resources ◽  
Land Use Change ◽  
Climate Variability ◽  
River Basin ◽  
Water Flow ◽  
Water Storage ◽  
Green Water ◽  
Efficiency Coefficient ◽  
Relative Change

Based on a land use interpretation and distributed hydrological model, soil and water assessment tool (SWAT), this study simulated the hydrological cycle in Xihe River Basin in northern China. In addition, the influence of climate variability and land use change on green water resources in the basin from 1995 to 2015 was analyzed. The results show that (1) The ENS (Nash-Sutcliffe model efficiency coefficient) and R2 (coefficient of determination) were 0.94 and 0.89, respectively, in the calibration period, and 0.89 and 0.88, respectively, in the validation period. These indicate high simulation accuracy; (2) Changes in green water flow and green water storage due to climate variability accounted for increases of 2.07 mm/a and 1.28 mm/a, respectively. The relative change rates were 0.49% and 0.9%, respectively, and the green water coefficient decreased by 1%; (3) Changes in green water flow and green water storage due to land use change accounted for increases of 69.15 mm and 48.82 mm, respectively. The relative change rates were 16.4% and 37.2%, respectively, and the green water coefficient increased by 10%; (4) Affected by both climate variability and land use change, green water resources increased by 121.3 mm and the green water coefficient increased by 9% in the Xihe River Basin. It is noteworthy that the influence of land use change was greater than that of climate variability.

scholarly journals Flow routing with Semi-distributed hydrological model HEC- HMS in case of Narayani River Basin

2014 ◽  
Vol 10 (1) ◽  
pp. 45-58
Author(s):  
Narayan Prasad Gautam
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Hydrological Modeling ◽  
Numerical Solutions ◽  
Peak Flow ◽  
Channel Cross Section ◽  
Hydrological Models ◽  
Distributed Hydrological Model ◽  
Element Discretization ◽  
Verification Period

 Routing is the modeling process to determine the outflow at an outlet from given inflow at upstream of the channel. A hydrological simulation model use mathematical equations that establish relationships between inputs and outputs of water system and simulates the catchment response to the rainfall input. Several hydrological models have been developed to assist in understanding of hydrologic system and water resources management. A model, once calibrated and verified on catchments, provides a multi-purpose tool for further analysis. Semi-Distributed models in hydrology are usually physically based in that they are defined in terms of theoretically acceptable continuum equations. They do, however, involve some degree of lumping since analytical solutions to the equations cannot be found, and so approximate numerical solutions, based on a finite difference or finite element discretization of the space and time dimensions, are implemented. Many rivers in Nepal are either ungauged or poorly gauged due to extreme complex terrains, monsoon climate and lack of technical and financial supports. In this context the role of hydrological models are extremely useful. In practical applications, hydrological routing methods are relatively simple to implement reasonably accurate. In this study, Gandaki river basin was taken for the study area. Kinematic wave method was used for overland routing and Muskingum cunge method was applied for channel routing to describe the discharge on Narayani river and peak flow attenuation and dispersion observed in the direct runoff hydrograph. Channel cross section parameters are extracted using HEC- GeoRAS extension tool of GIS. From this study result, Annual runoff, Peak flow and time of peak at the outlet are similar to the observed flow in calibration and verification period using trapezoidal channel. Hence Hydrological modeling is a powerful technique in the planning and development of integrated approach for management of water resources. DOI: http://dx.doi.org/10.3126/jie.v10i1.10877Journal of the Institute of Engineering, Vol. 10, No. 1, 2014 pp. 45-58

scholarly journals Hydrological Simulation and Runoff Component Analysis over a Cold Mountainous River Basin in Southwest China

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1705 ◽  
Author(s):  
Weidong Xuan ◽  
Qiang Fu ◽  
Guanghua Qin ◽  
Cong Zhu ◽  
Suli Pan ◽  
...  
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Hydrological Modeling ◽  
Hydrological Model ◽  
Assessment Tool ◽  
Substantial Contribution ◽  
Hydrological Simulation ◽  
Total Runoff ◽  
Mountainous Catchments ◽  
Hydrological Signatures

Assessment of water resources from mountainous catchments is crucial for the development of upstream rural areas and downstream urban communities. However, lack of data in these mountainous catchments prevents full understanding of the response of hydrology or water resources to climate change. Meanwhile, hydrological modeling is challenging due to parameter uncertainty. In this work, one tributary of the Yarlung Zangbo River Basin (the upper stream of the Brahmaputra River) was used as a case study for hydrological modeling. Tropical Rainfall Measuring Mission (TRMM 3B42V7) data were utilized as a substitute for gauge-based rainfall data, and the capability of simulating precipitation, snow, and groundwater contributions to total runoff by the Soil and Water Assessment Tool (SWAT) was investigated. The uncertainty in runoff proportions from precipitation, snowmelt, and groundwater was quantified by a batch-processing module. Hydrological signatures were finally used to help identify if the hydrological model simulated total runoff and corresponding proportions properly. The results showed that: (1) TRMM data were very useful for hydrological simulation in high and cold mountainous catchments; (2) precipitation was the primary contributor nearly all year round, reaching 56.5% of the total runoff on average; (3) groundwater occupied the biggest proportion during dry seasons, whereas snowmelt made a substantial contribution only in late spring and summer; and (4) hydrological signatures were useful for helping to evaluate the performance of the hydrological model.

Spatial and temporal changes of water quality, and SWAT modeling of Vosvozis river basin, North Greece

2010 ◽  
Vol 45 (11) ◽  
pp. 1421-1440 ◽  
Author(s):  
Ioannis Boskidis ◽  
Georgios D. Gikas ◽  
Vassilios Pisinaras ◽  
Vassilios A. Tsihrintzis
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Temporal Changes ◽  
Spatial And Temporal Changes

Spatial and Temporal Changes of Landscape Pattern in Li River Basin

2014 ◽  
Vol 1065-1069 ◽  
pp. 2878-2881
Author(s):  
Juan Li Jing ◽  
Yong Feng Wang
Keyword(s):  
River Basin ◽  
Landscape Pattern ◽  
Social Factors ◽  
Temporal Changes ◽  
Landscape Index ◽  
Bare Rock ◽  
Maximum Likelihood Classification ◽  
Class Level ◽  
Spatial And Temporal Changes ◽  
Landscape Types

Spatial and temporal changes of landscape pattern in Li River basin was analyzed based on Landsat TM and OLI data in 1991 and 2013. Maximum likelihood classification method was used to extract land use information in two periods. In FRAGSTATS platform, the characteristics of landscape types were quantitatively analyzed by selecting landscape index at class level and landscape level. Results showed: (1) the area of forest landscape increased significantly, while shrub and bare rock decreased obviously. (2) landscape types were characteristic of high inner homogeneity and low heterogeneity. (3) the evolution of landscape pattern was significantly affected by human activities and social factors.

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