喀什地区不同TDS浅层地下水分布及资源量估算

Distribution and Resource Estimation of Shallow Groundwater with Different TDS in Kashgar Region of Xinjiang

对2014年喀什地区浅层地下水112个水样统计分析得出,TDS平均值为2.49 g/L,达到中盐度地下水标准;TDS为正偏态分布,值域范围分布较广。克里金插值对浅层地下水TDS分区得出,喀什地区淡水(≤2 g/L)、中盐度地下水(2～7 g/L)和高盐度地下水(>7 g/L)分布面积分别12 209.5、29 315.9和873.5 km^2,分别占总面积42 398.9km^2的28.8%、69.1%和2.1%。采用GIS技术,依据2002-2004年完成的"新疆平原区地下水资源调查与评价"地下水补给资源模数分区成果,与TDS分区交并,计算了淡水、中盐度地下水和高盐度地下水的总补给量分别为28.52、32.85和0.42亿m^3/a,分别占总补给量61.79亿m^3/a的46.1%、53.2%和0.7%。由此提出合理利用喀什地区地下水资源的建议。

The statistical analysis of 112 samples of shallow groundwater in Kashgar region in 2014 showed that the average TDS was 2.49 g/ L, reached the medium salinity groundwater standards. The TDS of the shallow groundwater in the Kashgar region was positive skew distribution, and the range was wide. The Kriging interpolation of shallow groundwater TDS divisions showed that the distributions area of freshwater（ ≤ 2 g/L）, medium salinity groundwater （ 2 - 7 g/L） and high salinity groundwater （ 〉 7 g/L） in Kashgar region were 12 209.5, 29 315.9 and 873.5 km2, accounting for 28.8%, 69.1% and 2.1% of the total area 42 398.9 km2. Using GIS technology, based on the modular partitions of groundwater recharge resources results of Groundwater Resources Survey and Evaluation in Xinjiang Plain Areas （ 2002 -2004）, united with TDS partitions, the recharge resources quantities of freshwaters, medium salinity groundwater and high salinity groundwater were calculated, which is 28.52×10^8, 32.85× 10^8 and 0.42× 10^8 m3/a, accounting for 46.1%, 53.2% and 0.7% of total groundwater recharge 61.79×10^8 m3/a. The suggestions of groundwater resources rational utilization were put forward in the end.