1) precipitation effectiveness
降水有效性
3) effective precipitation
有效降水
1.
The causes of climate dry in loess plateau area of Gansu province are autumn rain precipitations, great variation in year-to-year precipitation, less effective precipitation, air drying and windy, therefore,freguent natural disaster can lead forest ecological construction more and more difficult.
秋雨型降水、降水年际变化大、有效降水少、大气干燥多风等因素叠加在一起,构成了甘肃省黄土高原区气候干旱的本质所在,频繁的自然灾害进一步导致该区林业生态建设难上加难。
4) precipitation and P-E
降水和有效降水
5) Effective precipitation
有效降水量
1.
After statistically analyzing the relationship of the 10 days total precipitation as the landslide occurring on 1 615 samples of Chongqing, it can be obtained the relationship of the rainfall, the time of the landslide taking place and the probability of the landslide taking place,which is given landslides induced by the effective precipitation definitions, calculati.
通过对重庆1615个滑坡个例与其发生前10d降水量值做统计分析,揭示了降水量、滑坡发生时间、滑坡发生概率三者之间的关系,由此给出了诱发滑坡的有效降水量定义、计算思路和计算公式,并依此建立了强降水诱发的滑坡预报模型。
2.
through the analysis on relationship and change trend between the precipitation and effective precipitation in growth period of winter wheat,effective precipitation calculation models under different time scale were given in Xinxiang area,which to meet the demand of regional agricultural development and water resources optimization management.
通过模拟结果分析冬小麦生长期降水量和有效降水量相互关系及变化趋势,确定了该地区不同时长尺度下冬小麦生育期有效降水量适宜计算模式,以满足区域农业发展规划及水资源优化配置管理的需求。
6) effective rainfall
有效降水量
1.
Based on the pertinent iterature,the calculation methods of effective rainfall in growing period on dry crop was analysed and summarized in this paper,which combines with research situation of calculation methods of effective rainfall.
在查阅国内外相关文献的基础上,对目前有效降水量的研究方法进行了简要的评述,并结合现有有效降水量计算模式,对它们的适应性和计算结果的可靠性进行了对比分析。
2.
Based on the small-scale hydrology theory and the effective rainfall,a new soil water resources calculating model was put forward,which calculated the soil water resources by water balance principle.
依据小尺度水文学原理,提出了基于有效降水量的土壤水资源计算模型,利用水量平衡原理计算土壤水资源量。
补充资料：有效降水
有效降水
effective precipitation
youxiao!iangshui有效降水(effeetive preeipitation)自然降水中实际补充到植物根层土壤水分的部分。降雨开始时，最初一部分雨量被植物枝叶所截留，称为植物截留量，在微雨的情况下截留量可达3毫米左右。超过植物截留量才落于地面，开始被土壤吸收。当降雨强度超过入渗率时，开始产生地面径流。当降雨时间较长或多次降水之后，地面长期积水，根层土壤达到饱和时将产生深层渗漏，下渗到根层之下，补给地下水。因此，自然降水中实际为根层土壤吸收的水分(Re)为实际降水量(R)减去截留量(V)、径流量(Q)和深层渗漏量(f)，即为有效降水，其表达式为: Re~R一V一Q一f也有人认为截留量和深层渗漏量对植物生育有一定的意义，前者可以改善冠层的小气候，后者可以补充地下水。有效降水用来和农作物需水量进行对比分析，可以对降水资源作出恰当的农业气候评价。 (邓根云)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条