General climatic conditions
The JIA Scheme falls within a hyper-arid part of the Orange-Senqu River Basin and experiences a harsh climate. Some of the main characteristics of the prevailing climatic conditions for the JIA are provided below:
Weather forecast for Noordoewer and Vioolsdrift
An automated weather station was erected at a suitable site near the JIA office, which is approximately midway into the scheme and therefore, from a climate point of view, fairly representative of the conditions in the scheme.
Information is transmitted via radio at 15 minute intervals to the JIA server, and then sent together with the soil probe data to a online server.
The position of the erected JIA weather station is indicated on the map below, as well as the position of the Department of Water Affairs (DWA) of South Africa’s weather station at the scheme’s weir. The DWA station was however discontinued in 2000.
The map below provides the positions of the JIA and Department of Water Affairs of South Africa’s weather stations (D8E001). The JIA station’s near real-time data is available by clicking on the JIA station’s marker and selecting the appropriated link. The historic rainfall data and graph of D8E001 can also be accessed by clicking on the marker and selecting the link to the DWA Hydstra Website. The map also provides the position and names of the canals as well as detailed information about the irrigated fields, by clicking on the respective elements.
Legend: Weather Station Canals Irrigated fields