Assessing hydrologic alterations due to reservoirs and intensified irrigation in a semi‐arid agricultural river basin using SWAT *

2021 ◽  
Author(s):  
Nada Jouma ◽  
Filiz Dadaser‐Celik
Keyword(s):  
River Basin ◽  
Semi Arid ◽  
Hydrologic Alterations

Geochemical and isotope evidence for groundwater mineralization in a semi-arid river basin, Sri Lanka

2020 ◽  
pp. 104799
Author(s):  
Sachintha Senarathne ◽  
J.M.C.K. Jayawardana ◽  
E.A.N.V. Edirisinghe ◽  
Rohana Chandrajith
Keyword(s):  
Sri Lanka ◽  
River Basin ◽  
Isotope Evidence ◽  
Semi Arid ◽  
Groundwater Mineralization

scholarly journals Application of Markov chains to Standardized Precipitation Index (SPI) in São Francisco River Basin

2019 ◽  
Vol 14 (3) ◽  
pp. 1
Author(s):  
Esdras Adriano Barbosa dos Santos ◽  
Tatijana Stosic ◽  
Ikaro Daniel de Carvalho Barreto ◽  
Laélia Campos ◽  
Antonio Samuel Alves da Silva
Keyword(s):  
Markov Chains ◽  
River Basin ◽  
Arid Region ◽  
Standardized Precipitation Index ◽  
Precipitation Index ◽  
Severe Drought ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Semi Arid Region ◽  
Semi Arid

This work evaluated dry and rainy conditions in the subregions of the São Francisco River Basin (BHSF) using the Standardized Precipitation Index (SPI) and Markov chains. Each subregion of the BHSF has specific physical and climatic characteristics. The data was obtained from the National Water Agency (ANA), collected by four pluviometric stations (representative of each subregion), covering 46 years of data, from 1970 to 2015. The SPI was calculated for the time scales of six and twelve months and transition probabilities were obtained using the Markov chain. Transition matrices showed that, at both scales, if the climate conditions were severe drought or rainy, switching to another class would be unlikely in the short term.  Correlating this information with the probabilities of the stationary distribution, it was possible to find the regions that are most likely to be under rainy or dry weather in the future. The recurrence times calculated for the stations that belong to the semi-arid region were smaller when compared to the value of the return period of the representative station of Upper São Francisco that has higher levels of precipitation, confirming the predisposition of the semi-arid region to present greater chances of future periods of drought.

Assessment of the impact on sediment quality from abandoned artisanal mine runoffs in a semi-arid environment (the Sonora River basin—Northwestern Mexico)

2019 ◽  
Vol 78 (5) ◽  
Author(s):  
Héctor M. Guzmán ◽  
Agustín Gómez-Álvarez ◽  
Jesús L. Valenzuela-García ◽  
Martín A. Encinas-Romero ◽  
Arturo I. Villalba-Atondo ◽  
...  
Keyword(s):  
River Basin ◽  
Sediment Quality ◽  
Arid Environment ◽  
Northwestern Mexico ◽  
The Impact ◽  
Semi Arid

scholarly journals CLIMATE CHANGE IMPACT ASSESSMENT ON THE HYDROLOGY OF A SEMI-ARID RIVER BASIN

2014 ◽  
Vol 70 (4) ◽  
pp. I_121-I_126
Author(s):  
Asif M. BHATTI ◽  
Toshio KOIKE ◽  
Patricia Ann JARANILLA-SANCHEZ ◽  
Mohamed RASMY ◽  
Kohei YOSHIMURA ◽  
...  
Keyword(s):  
Climate Change ◽  
Impact Assessment ◽  
River Basin ◽  
Climate Change Impact ◽  
Climate Change Impact Assessment ◽  
Change Impact ◽  
Semi Arid

The assessment of surface water resources for the semi-arid Yongding River Basin from 1956 to 2000 and the impact of land use change

2010 ◽  
Vol 24 (9) ◽  
pp. 1123-1132 ◽  
Author(s):  
Lei Wang ◽  
Zhongjing Wang ◽  
Toshio Koike ◽  
Hang Yin ◽  
Dawen Yang ◽  
...  
Keyword(s):  
Land Use ◽  
Surface Water ◽  
Water Resources ◽  
Land Use Change ◽  
River Basin ◽  
Surface Water Resources ◽  
The Impact ◽  
Semi Arid ◽  
Yongding River

Analysing the effectiveness of groundwater regulation: a comparative study of Turkey and California

2020 ◽  
Author(s):  
Muhammed Yasir Ak ◽  
David Benson ◽  
Karen Scott
Keyword(s):  
Surface Water ◽  
Groundwater Management ◽  
River Basin ◽  
Groundwater Resources ◽  
Arid Zones ◽  
Groundwater Abstraction ◽  
Regulatory Requirements ◽  
Legislative Framework ◽  
Agricultural Use ◽  
Semi Arid

<p>Groundwater abstraction has increased significantly around the world in the last three decades, placing a strain on the sustainability of domestic and agricultural use plus negatively impacting the role groundwater plays in water storage in the absence of surface water. While the proportionality of surface water use has decreased as a result, groundwater has expanded its share of freshwater use. Groundwater management challenges are particularly acute in semi-arid zones due to low replenishment rates. Multiple regulatory innovations are consequently emerging in different countries to regulate groundwater usage but comparative analyses of their effectiveness are limited. In addressing this gap, our paper therefore compares the regulatory performance of the Water Framework Directive (WFD) in Turkey with the Sustainable Groundwater Management Act (SGMA) in California, two semi-arid zones, as a basis for policy learning. Both legislative measures impose river basin planning to protect groundwater resources and should provide them with strong protection. In analysing the effectiveness of these measures, this paper firstly identifies the key regulatory requirements of each legislative framework regarding groundwater protection. Secondly, it compares the institutional arrangements for implementing them, using specific river basin case studies. Thirdly, it quantifies groundwater use trends in river basins to assess the effectiveness of the WFD and SGMA. Finally, it comparatively discusses outcomes to determine the factors influencing implementation effectiveness, in order to inform future regulatory design.</p>

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