Use of remotely sensed derived metrics to assess wetland vegetation responses to climate variability-induced drought at the Soetendalsvlei wetland system in the Heuningnes Catchment, Western Cape province, South Africa

2021 ◽  
pp. 1-12
Author(s):  
NC Ndlala ◽  
T Dube
Keyword(s):  
South Africa ◽  
Climate Variability ◽  
Remotely Sensed ◽  
Wetland Vegetation ◽  
Western Cape ◽  
Western Cape Province ◽  
Vegetation Responses ◽  
Wetland System

scholarly journals Use of remotely sensed derived metrics to assess wetland vegetation responses to climate variability induced drought at the Soetendalsvlei wetland system in the Western Cape province of South Africa

2021 ◽  
Author(s):  
Noluthando Conelia Ndlala ◽  
Timothy Dube
Keyword(s):  
South Africa ◽  
Climate Variability ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Wetland Vegetation ◽  
Western Cape ◽  
Wetland Ecosystems ◽  
Dry Seasons ◽  
Vegetation Health ◽  
Wet And Dry Seasons

Abstract Wetland areas are the most vital ecosystems and they provide important functions towards stabilizing the environment. Hydrological processes in these wetland systems directly affects the productivity of plants. Therefore, assessing vegetation response to climate variability induced drought is vital in wetlands. In this paper, the subtle changes in vegetation distribution were used as a proxy to examine and quantify the extent of drought impacts on wetland ecosystems within the Heuningnes catchment, South Africa. First, vegetation health information was extracted by calculating the normalized difference vegetation index (NDVI) during the wet and dry seasons for the period between 2014 and 2018. The derived NDVI results were further statistical linked to the corresponding rainfall and evapotranspiration (ET) observed during the study period. An analysis of NDVI results revealed that gradual vegetation health change occurred across the study area. The highest derived NDVI (0.5) for wetland vegetation was observed during the year 2014 but progressively declined over the years. Change in vegetation health indicated a significant (α = 0.05) and positive correlation to the amount of rainfall received over the same period. The results of this study showed that healthy vegetation deteriorated between the study periods due to the 2015–2017 Western Cape drought.

scholarly journals Methylphenidate and atomoxetine prescribing trends in children in the Western Cape Province of South Africa, 2005–2013

2018 ◽  
Vol 23 ◽  
Author(s):  
Liezl Joubert ◽  
Johanita R. Burger ◽  
Ilse Truter ◽  
Martie S. Lubbe ◽  
Marike Cockeran
Keyword(s):  
South Africa ◽  
Western Cape ◽  
Western Cape Province ◽  
Prescribing Trends
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