柴达木盆地那棱格勒河流域的水资源与矿源意义

通过分析那棱格勒河流域水循环及水化学演化特征，对区域水资源及携带的矿产资源地质意义或潜在价值进行探讨。结果表明，那棱格勒河水循环特征表现为时空异质性大，径流主要集中于山区，四季变化很大。地下水动态年际或季节性波动明显异于一般干旱盆地，丰水期表现为水位显著上涨趋势，表明水循环条件优越，补给更新周期快。流域中下游地表水、地下水含有高背景浓度的硼、锂、钾等元素，且具有来自深源流体源源不断的补充，径流年输入总量至少数千上万吨，仅洪积扇带150 m以上地下水储存总量也在10万t级以上。流域水资源丰富，上游支流适当调水，既可增加其中溶解的硼、锂、钾等矿产元素总量，又保证了青藏线的安全，同时补充出山口调走的水量，保持动态平衡。

Water resource and mineral source significances of Nalenggele River Catchment in Qaidam Basin

The characteristics of hydro-logical cycle and hydro-chemical evolution of Nalenggele River Catchment were summarized and the programs of the regional water resources exploration and diversion were comprehensively proposed. Results show that the spatial-temporal difference of the hydro-logical cycle is distinct in the Nalenggele River. The runoff is mainly concentrated in the mountain area and varies greatly throughout the year. Besides, the dynamic inter annual or seasonal fluctuation of groundwater level is larger than ordinary arid basin and exhibits an increasing trend in wet season, which means that the water circulation conditions are ideal and water resources are abundant in wet season. More typically, both the surface water and groundwater contain unusual enriched elements of B, Li and K in the middle and lower reaches of the basin. The enriched elements are of continuous deep-source supply with annual runoff of at least several thousand tons, and the total amount of groundwater about 150 m in the alluvial fan is beyond 100-thousand tons. The conclusion can be deduced that the water transfer from the upper tributaries can not only increase the total amount of dissolved mineral elements such as B, Li and K, but also ensure the safety of the Qinghai-Tibet line for the leakage water from lakes in the source area. Finally, it is of great strategic significance to maintain dynamic water resource balance in the Nalenggele River.