scholarly journals Understanding Hydrological Variability for Improved Water Management in the Semi-Arid Karkheh Basin, Iran

2011 ◽  
Author(s):  
Ilyas Masih
Keyword(s):  
Water Management ◽  
Hydrological Variability ◽  
Semi Arid ◽  
Karkheh Basin

Remote sensing for irrigation water management in the semi-arid Northeast of Brazil

2009 ◽  
Vol 96 (10) ◽  
pp. 1398-1408 ◽  
Author(s):  
M.T. Folhes ◽  
C.D. Rennó ◽  
J.V. Soares
Keyword(s):  
Water Management ◽  
Remote Sensing ◽  
Irrigation Water ◽  
Irrigation Water Management ◽  
Semi Arid

scholarly journals The Impact of Green Water Management Strategies on Household-Level Agricultural Water Productivity in a Semi-Arid Region: A Survey-based Assessment

Water ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 11 ◽  
Author(s):  
Afton Clarke-Sather ◽  
Xia Tang ◽  
Yonglan Xiong ◽  
Jiansheng Qu
Keyword(s):  
Water Management ◽  
Arid Region ◽  
Water Productivity ◽  
Management Strategies ◽  
Green Water ◽  
Agricultural Water ◽  
Household Level ◽  
Semi Arid Region ◽  
The Impact ◽  
Semi Arid

scholarly journals Changing rainfall patterns and farmers’ adaptation through soil water management practices in semi-arid eastern Kenya

2016 ◽  
Vol 30 (3) ◽  
pp. 229-238 ◽  
Author(s):  
John Walker Recha ◽  
Bancy M. Mati ◽  
Mary Nyasimi ◽  
Philip K. Kimeli ◽  
James M. Kinyangi ◽  
...  
Keyword(s):  
Water Management ◽  
Soil Water ◽  
Management Practices ◽  
Rainfall Patterns ◽  
Semi Arid

Water management in a semi-arid region: an analogue algorithm approach for rainfall seasonal forecasting

2008 ◽  
pp. 237-244 ◽  
Author(s):  
Giampiero Maracchi ◽  
Massimiliano Pasqui ◽  
Francesco Piani
Keyword(s):  
Water Management ◽  
Arid Region ◽  
Seasonal Forecasting ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Effects of model calibration on hydrological and water resources management simulations under climate change in a semi-arid watershed

2020 ◽  
Vol 163 (3) ◽  
pp. 1247-1266 ◽  
Author(s):  
Hagen Koch ◽  
Ana Lígia Chaves Silva ◽  
Stefan Liersch ◽  
José Roberto Gonçalves de Azevedo ◽  
Fred Fokko Hattermann
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Water Resources ◽  
Water Resources Management ◽  
Model Calibration ◽  
Arid Regions ◽  
Discharge Data ◽  
Resources Management ◽  
North Eastern ◽  
Semi Arid

AbstractSemi-arid regions are known for erratic precipitation patterns with significant effects on the hydrological cycle and water resources availability. High temporal and spatial variation in precipitation causes large variability in runoff over short durations. Due to low soil water storage capacity, base flow is often missing and rivers fall dry for long periods. Because of its climatic characteristics, the semi-arid north-eastern region of Brazil is prone to droughts. To counter these, reservoirs were built to ensure water supply during dry months. This paper describes problems and solutions when calibrating and validating the eco-hydrological model SWIM for semi-arid regions on the example of the Pajeú watershed in north-eastern Brazil. The model was calibrated to river discharge data before the year 1983, with no or little effects of water management, applying a simple and an enhanced approach. Uncertainties result mainly from the meteorological data and observed river discharges. After model calibration water management was included in the simulations. Observed and simulated reservoir volumes and river discharges are compared. The calibrated and validated models were used to simulate the impacts of climate change on hydrological processes and water resources management using data of two representative concentration pathways (RCP) and five earth system models (ESM). The differences in changes in natural and managed mean discharges are negligible (< 5%) under RCP8.5 but notable (> 5%) under RCP2.6 for the ESM ensemble mean. In semi-arid catchments, the enhanced approach should be preferred, because in addition to discharge, a second variable, here evapotranspiration, is considered for model validation.

scholarly journals The causes of flow regime shifts in the semi-arid Hailiutu River, Northwest China

2012 ◽  
Vol 16 (1) ◽  
pp. 87-103 ◽  
Author(s):  
Z. Yang ◽  
Y. Zhou ◽  
J. Wenninger ◽  
S. Uhlenbrook
Keyword(s):  
Flow Regime ◽  
River Discharge ◽  
Yellow River ◽  
Climatic Factors ◽  
Northwest China ◽  
Regime Shifts ◽  
Hydrological Variability ◽  
Pettitt Test ◽  
Crop Area ◽  
Semi Arid

Abstract. Identifying the causes (climate vs. human activities) for hydrological variability is a major challenge in hydrology. This paper examines the flow regime shifts, changes in the climatic variables such as precipitation, evaporation, temperature, and crop area in the semi-arid Hailiutu catchment in the middle section of the Yellow River by performing several statistical analyses. The Pettitt test, cumulative sum charts (CUSUM), regime shift index (RSI) method, and harmonic analysis were carried out on annual, monthly, and daily discharges. Four major shifts in the flow regime have been detected in 1968, 1986, 1992 and 2001. Characteristics of the flow regime were analyzed in the five periods: 1957–1967, 1968–1985, 1986–1991, 1992–2000, and 2001–2007. From 1957 to 1967, the flow regime reflects quasi natural conditions of the high variability and larger amplitude of 6 months periodic fluctuations. The river peak flow was reduced by the construction of two reservoirs in the period 1968–1985. In the period of 1986–1991, the river discharge further decreased due to the combined influence of river diversions and increase of groundwater extractions for irrigation. In the fourth period of 1992–2000, the river discharge reached lowest flow and variation in corresponding to a large increase in crop area. The flow regime recovered, but not yet to natural status in the fifth period of 2001–2007. Climatic factors are found not likely responsible for the changes in the flow regime, but the changes in the flow regime are corresponding well to historical land use policy changes.

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