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1)  decline of groundwater level
地下水下降幅度
1.
And the major role causing the decline of groundwater level was calculated on the basis of the above simulations.
同时,由反映农作物灌溉耗水量与地下水埋深变化之间关系的公式得知:灌溉粮食作物引起的地下水下降幅度最大,占总下降幅度的70。
2)  downrange of groundwater depth
地下水位降幅
1.
The results showed that:(1)most of oases lied in 20~30 m of the downrange of groundwater depth which were decreased as circus from north to south in study area;(2)there were the sensitive region in 5~8 m and severe decline area over 10 m;(3)distributing region of nature vegetation countermarched from southwest to northeast,and its reduced area was clo.
综合运用RS、GIS及地理统计学的理论、技术,监测干旱区地下水位降幅对天然植被衰退过程的影响。
2.
Results showed that: data obeyed normal distribution characteristic,structure was up to spherical model, special data was second trend; Most of oases lied in 20-30metres of the downrange of groundwater depth which were decreased as circus from north to south in study area.
基于GIS和地理统计学的理论、方法对所取观测井地下水位降幅数据进行空间分布特征分析。
3)  decent degree
下降幅度
1.
It includes three items: comparison benchmark,decent degree,disclosing time.
它主要涉及3个方面的核心问题:第一,比较基准,即当期的业绩和什么基准进行比较;第二,下降幅度,即当业绩下降多少的时候,需要预警;第三,预警时间,即在什么时候预警。
4)  water table depression
地下水水位下降
5)  drawdown [groundwater]
水位下降(地下水)
6)  groundwater level recession
地下水位下降
1.
This paper deals with the essential problems of environmental geology in Zunyi City: pollution, groundwater level recession, land collapse, drought, flood and water logging, and other geological harzards, and provides the measures of prevention and cure for these problems.
本文论述了遵义市的主要环境地质问题:污染、地下水位下降和地面塌陷、干旱和洪涝等。
补充资料:地下
1.地面以下;地层内部。 2.谓政党﹑团体等处于非法﹑秘密活动状态。 3.指阴间。 4.地面上。
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