Abstract: In the paper, by integrative using GIS and Geostatistics, we analyzed the special distribution characteristic of groundwater downrange in arid area.

基GIS和地理统计学的理论、方法对所取观测井地下位降幅行空间分布特征分析。

Based on the quality data of overyear water table and groundwater, the research studied the dynamic variation of water table and quality of groundwater.

摘要本文在总结银川地区地下监测点的多年位和质资料的基础上，研究地下位的动变化和质随时间的变化。

Ice jam flood: a lot of frazil ices and crushed ices gather under the covering ice, causing heading up of water level of upper reach.

冰塞洪，大量冰花与碎冰在盖面冰下集聚，造成上游位显著壅高的现象。

After the Three Gorges Reservoir impounded, due to the rise of ground water, the flabbiness layers in landslides will become soft and collapse when they meet water.

三峡库区蓄后,位上升滑坡地区的软弱层遇到就会变软并引起滑塌。

Overpumping groundwater for drinking water and irrigation has caused water levels to decline by tens of metres in many regions, forcing people to use low-quality water for drinking.

过度抽取地下做为饮用和用来灌溉在许多地区已经使位下降了几十米，迫使人们使用质量较差的来做为饮。

The resistance to float relates to the attributes and conditions of the ground water, the pressure and floatage of water, the change of water level and the sudden supplement of water.

结构抗浮验算与地下的性状、压力和浮力、下位变化的影响因素、外补有关。

By fluviograph survey water level, after clear signal processing, inputs the control water level in PLC, then carries on the control by PLC to the water level control valve to adjust the water level.

位计测量位，行信号处理后输入控制位的PLC中，然后PLC对位控制阀行控制以调节位。