EARTH OBSERVATION AND THE IN-SITU-BASED ASSESSMENT OF THE IMPACTS OF LAND USE AND LAND COVER CHANGES ON WATER QUALITY AND QUANTITY IN KEY WATER RESOURCES OF LIMPOPO AND THE EASTERN CAPE, SOUTH AFRICA EARTH OBSERVATION AND THE IN-SITU-BASED ASSESSMENT OF THE IMPACTS OF LAND USE AND LAND COVER CHANGES ON WATER QUALITY AND QUANTITY IN KEY WATER RESOURCES OF LIMPOPO AND THE EASTERN CAPE, SOUTH AFRICA Posted in .