Relationships between NDVI , river discharge and climate in the Okavango River Basin region

India is a subcontinent, there huge no of people lived in river basin area. In India there more or less 80% of people directly or indirectly depend on River. Ganga, Brahamputra in North and North East and Mahanadi, Govabori, Krishna, Kaveri, Narmoda, Tapti, Mahi in South are the major river basin in India. There each year due to flood and high tide lots of people are suffered in river basin region in India. These problems destroy the socio economic peace and hope of the people in river basin. There peoples are continuously suffered by lots of difficulties in sort or in long term basis. Few basin regions are always in high alert at the time of monsoon seasons. Sometime due to over migration from basin area, it becomes empty and creates an ultimate loss of resources in India and causes a dis-balance situation in this area.

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Nitrate leaching in irrigated inorganic agriculture: A case study of Mashare commercial farm in Namibia, Okavango River Basin

African Journal of Agricultural Research ◽

10.5897/ajar2016.11016 ◽

2016 ◽

Vol 11 (31) ◽

pp. 2871-2881 ◽

Cited By ~ 3

Author(s):

Vushe Andrea ◽

von Landsberg Loffie ◽

Groengroeft Alexander ◽

A Mashauri Damas

Keyword(s):

River Basin ◽

Nitrate Leaching ◽

Commercial Farm ◽

Okavango River

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River discharge estimation at daily resolution from satellite altimetry over an entire river basin

Journal of Hydrology ◽

10.1016/j.jhydrol.2017.01.009 ◽

2017 ◽

Vol 546 ◽

pp. 230-247 ◽

Cited By ~ 47

Author(s):

M.J. Tourian ◽

C. Schwatke ◽

N. Sneeuw

Keyword(s):

River Basin ◽

River Discharge ◽

Satellite Altimetry ◽

Discharge Estimation

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Water flow dynamics in the Okavango River Basin and Delta––a prerequisite for the ecosystems of the Delta

Physics and Chemistry of the Earth Parts A/B/C ◽

10.1016/j.pce.2003.09.002 ◽

2003 ◽

Vol 28 (20-27) ◽

pp. 1165-1172 ◽

Cited By ~ 35

Author(s):

Lotta Andersson ◽

Thomas Gumbricht ◽

Denis Hughes ◽

Dominic Kniveton ◽

Susan Ringrose ◽

...

Keyword(s):

River Basin ◽

Water Flow ◽

Flow Dynamics ◽

Okavango River

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Human and Natural Impacts on the Water Resources in the Syr Darya River Basin, Central Asia

Sustainability ◽

10.3390/su11113084 ◽

2019 ◽

Vol 11 (11) ◽

pp. 3084 ◽

Cited By ~ 19

Author(s):

Shan Zou ◽

Abuduwaili Jilili ◽

Weili Duan ◽

Philippe Maeyer ◽

Tim de Voorde

Keyword(s):

Water Resources ◽

Central Asia ◽

River Basin ◽

River Discharge ◽

Water Resource Management ◽

Agricultural Land ◽

Sharp Decline ◽

Essential Information ◽

Effective Water ◽

Syr Darya

Water resources are increasingly under stress in Central Asia because downstream countries are highly dependent on upstream countries. Water is essential for irrigation and is becoming scarcer due to climate change and human activities. Based on 20 hydrological stations, this study firstly analyzed the annual and seasonal spatial–temporal changes of the river discharges, precipitation, and temperature in the Syr Darya River Basin and then the possible relationships between these factors were detected. Finally, the potential reasons for the river discharge variations have been discussed. The results show that the river discharges in the upper stream of the basin had significantly risen from 1930 to 2006, mainly due to the increase in temperature (approximately 0.3 °C per decade), which accelerated the melting of glaciers, while it decreased in the middle and lower regions due to the rising irrigation. In the middle of the basin, the expansion of the construction land (128.83 km2/year) and agricultural land (66.68 km2/year) from 1992 to 2015 has significantly augmented the water consumption. The operations of reservoirs and irrigation canals significantly intercepted the river discharge from the upper streams, causing a sharp decline in the river discharges in the middle and lower reaches of the Syr Darya River in 1973. The outcomes obtained from this study allowed us to understand the changes in the river discharges and provided essential information for effective water resource management in the Syr Darya River Basin.

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Bat Species Richness and Community Composition along a Mega-transect in the Okavango River Basin

Diversity ◽

10.3390/d12050188 ◽

2020 ◽

Vol 12 (5) ◽

pp. 188 ◽

Cited By ~ 1

Author(s):

Sina M. Weier ◽

Mark Keith ◽

Götz G. Neef ◽

Daniel M. Parker ◽

Peter J. Taylor

Keyword(s):

Species Richness ◽

Community Composition ◽

River Basin ◽

Total Activity ◽

Environmental Drivers ◽

Conservation Strategies ◽

Miombo Woodlands ◽

Human Land Use ◽

Functional Community ◽

Okavango River

The Okavango River Basin is a hotspot of bat diversity that requires urgent and adequate protection. To advise future conservation strategies, we investigated the relative importance of a range of potential environmental drivers of bat species richness and functional community composition in the Okavango River Basin. During annual canoe transects along the major rivers, originating in the central Angolan highlands, we recorded more than 25,000 bat echolocation calls from 2015 to 2018. We corrected for possible biases in sampling design and effort. Firstly, we conducted rarefaction analyses of each survey year and sampling appeared to be complete, apart from 2016. Secondly, we used total activity as a measure of sample effort in mixed models of species richness. Species richness was highest in the Angola Miombo Woodlands and at lower elevations, with higher minimum temperatures. In total, we identified 31 individual bat species. We show that even when acoustic surveys are conducted in remote areas and over multiple years, it is possible to correct for biases and obtain representative richness estimates. Changes in habitat heterogeneity will have detrimental effects on the high richness reported here and human land-use change, specifically agriculture, must be mediated in a system such as the Angolan Miombo Woodland.

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Hydrological modelling of climate change impacts on river flows in Siberia's Lena River Basin and implications for the Atlantic Meridional Overturning Circulation

Hydrology Research ◽

10.2166/nh.2019.151 ◽

2019 ◽

Vol 50 (6) ◽

pp. 1577-1595 ◽

Cited By ~ 4

Author(s):

C. E. Hudson ◽

J. R. Thompson

Keyword(s):

River Basin ◽

River Discharge ◽

Atlantic Meridional Overturning Circulation ◽

Meridional Overturning Circulation ◽

The Arctic ◽

Mean Annual Precipitation ◽

Overturning Circulation ◽

Lena River ◽

Ensemble Mean ◽

Meridional Overturning

Abstract A hydrological model of Siberia's Lena River Basin is calibrated and validated against observed river discharge at five stations. Implications of the Representative Concentration Pathway 4.5 scenario for river discharge are assessed using projections from 41 Coupled Model Intercomparison Project Phase 5 General Circulation Models grouped into 12 genealogical-based groups as well as a group ensemble mean. Annual precipitation increases in all scenarios (1.7–47.4%). Increases in annual PET are of a similar range (6.0–45.5%). PET peaks in June compared to July for the baseline. All temperature changes exceed 1.5 °C (range: 2.2 °C–6.2 °C). The largest absolute increases are in winter (maximum +7 °C). Changes in mean annual discharge range from −8.5 to +69.9%. Ten GCM groups and the group ensemble mean project increases. Earlier snowmelt is dominant so the annual flood peaks in May compared with June for the baseline. Increased discharge of the Lena and other Eurasian rivers to the Arctic Ocean has the potential to impact Atlantic Meridional Overturning Circulation (AMOC). Enhanced fluxes for four groups are capable of weakening the AMOC. Changes for other groups may contribute to weakening when combined with other sources of freshwater and warmer temperatures.

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Trend Analysis of Hydroclimatic Variables in the Kamo River Basin, Japan

Water ◽

10.3390/w11091782 ◽

2019 ◽

Vol 11 (9) ◽

pp. 1782 ◽

Cited By ~ 6

Author(s):

Maochuan Hu ◽

Takahiro Sayama ◽

Sophal TRY ◽

Kaoru Takara ◽

Kenji Tanaka

Keyword(s):

Trend Analysis ◽

River Basin ◽

River Discharge ◽

Water Resource Management ◽

Potential Evapotranspiration ◽

Kendall Test ◽

Winter Precipitation ◽

Significant Trend ◽

Mann Kendall Test ◽

Proactive Measures

Understanding long-term trends in hydrological and climatic variables is of high significance for sustainable water resource management. This study focuses on the annual and seasonal trends in precipitation, temperature, potential evapotranspiration, and river discharge over the Kamo River basin from the hydrological years 1962 to 2017. Homogeneity was examined by Levene’s test. The Mann–Kendall and a modified Mann–Kendall test as well as Sen’s slope estimator were used to analyze significant trends (p < 0.05) in a time series with and without serial correlation and their magnitudes. The results indicate that potential evapotranspiration calculated by the Penman–Monteith equation was highly related to temperature, and significantly increased in the annual and summer series. Annual river discharge significantly decreased by 0.09 m3/s. No significant trend was found at the seasonal scale. Annual, autumn, and winter precipitation at Kumogahata station significantly increased, while no significant trend was found at Kyoto station. Precipitation was least affected by the modified Mann–Kendall test. Other variables were relatively highly autocorrelated. The modified Mann–Kendall test with a full autocorrelation structure improved the accuracy of trend analysis. Furthermore, this study provides information for decision makers to take proactive measures for sustainable water management.

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