The hydrochemistry of rivers in KwaZulu-Natal
The hydrochemistry of rivers in KwaZulu-Natal
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DOI：
10.4314/wsa.v31i2.5202
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发表时间：
2007-12
期刊：
影响因子：
1.5
通讯作者：
S. Villiers
中科院分区：
文献类型：
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作者：
S. Villiers
2003年10月，监测了排出东部德拉肯斯堡陡崖的夸祖鲁-纳塔尔河水的主要元素的化学组成，并与之前沿着西部德拉肯斯堡陡崖（即卡莱东河和上橙子河）获得的数据进行了比较。在这两个调查中获得的数据显示，尽管略有不同的气候制度和不同的悬浮负荷的河流排水类似的岩性的Mg，Ca，Na，K和HCO 3 -含量没有显着差异。这意味着，岩性是占主导地位的控制主要元素化学的河水排水德拉肯斯堡。然而，在夸祖鲁-纳塔尔的西北部，在取样时遭受干旱，蒸发引起的浓缩不仅导致蒸发岩的形成，而且使河流和溪流的水化学发生巨大变化。NO3等次要成分的水平升高也表明，在耕作地区，人类活动对水质和成分产生了影响。
The chemistry of the major elements of KwaZulu-Natal river water draining the eastern Drakensberg Escarpment was monitored in October 2003 and compared to data obtained previously along the western Drakensberg Escarpment, i.e. the Caledon and Upper Orange Rivers. The data obtained in these two surveys reveal no significant differences in the Mg, Ca, Na, K and HCO 3 -content of rivers draining similar lithologies, despite slightly different climatic regimes and different suspended loads. The implication is that lithology is the dominant control on the major element chemistry of river water draining the Drakensberg. However, in the north-western part of KwaZulu-Natal, drought-stricken at the time of sampling, evaporation-induced concentration results not only in evaporite formation, but dramatic changes in river and stream water chemistry. Elevated levels of minor constituents such as NO3 also indicate that in cultivated areas anthropogenic activities have an impact on water quality and composition.