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

基于GIS和理统计学理论、方法对所取观下水位降幅数据进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下水监点多年水位和水质资料基础上，研究下水水位动变化和水质随时间变化。

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.

冰塞洪水，大量冰花与碎冰在盖面冰下集聚，造成上游水位显著壅高现象。

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.

三峡库蓄水后,由于水位上升滑坡软弱层遇到水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.

过度抽取下水做为饮用水和用来灌溉在许多已经使水位下降了几十米，迫使人们使用质量较差水来做为饮水。

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.

结构抗浮验算与下水性状、压力和浮力、下水位变化影响因素、外补水有关。

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.

由水位计量水位，进行信号处理后输入控制水位PLC中，然后由PLC对水位控制阀进行控制以调节水位。