Often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions and pumping it to nearby cropland.
在干旱的热带地区，提供灌溉水的最低成本的方法通常是建造小规模的工程。例如，在洼地收集雨水，然后将其抽调至附近的农田。
Better sediment control has reduced the risks of flooding with a network of small DAMS helping store water for towns and for agriculture when rainfall is low.
泥沙控制力度的加大降低了洪水风险，而新建的小型大坝网络可以在降水量较低的情况下帮助集镇和农业储存用水。
Small changes in rainfall can also trigger volcanic eruptions.
降雨量微小变化也能引发火山喷发。
We have organized and supported pilot programmes in places like South Africa, Turkey and Mexico that focus on small scale irrigation or community-based systems for harvesting rainfall.
我们组织并支持在南非、土耳其和墨西哥等国家开展试点计划，其重点是小型灌溉或以社区为基础的雨水收集系统。
The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and aft er management of small watershed in gully region of the loess plateau.
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The interdecadal variation of rainfall intensity shows that the regional mean days of small precipitation and middle precipitation have a decreasing trend over the upper reaches of Yangtze River.
长江上游降水强度也存在年代际变化，区域平均的弱降水天数和中等强度降水天数都呈现减少的趋势。
It has a steady reliable rainfall throughout the whole year. The temperature varie s within a small range.
全年有稳定可靠的降雨量，气温变化幅度小。
By 2050, many small islands in the Caribbean and Pacific could suffer from water shortages during low-rainfall periods.
2050年前，许多加勒比海和大平洋的小岛将在旱季遭到水短缺。
It has a steady reliable rainfall throughout the whole year. The temperature varies within a small range.
全年有稳定可靠的降雨量，气温变化幅度小。
It has a steady reliable rainfall throughout the whole year. The temperature varies within a small range.
全年有不变靠得住的降雨量，气温转变幅度小。
The variation of water and sand is studied under the influence of the rainfall and human activity in the fore and after management of small watershed in gully region of the loess plateau.
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The lag time of the flood peak behind the peak of heavy area rainfall is shorter in small river basins than that in large basins.
面雨量峰值出现时间与洪峰的出现时间之间存在着一定的滞后关系，一般是小流域滞后的时间短，而大流域滞后的时间长。
Small rainfall events mainly benefited herb species, and the high frequency but low amount of rainfall partially explained the relatively high vegetation cover in this area.
综合考虑降水模式与不同生活型植物对小雨量降水的响应特点，高频率的小雨量降水，可能是维持本区较高植被覆盖度的重要原因。
Studies on runoff-rainfall relationship are important to understand the hydrological processes and the water balance in a small catchment.
观测了水源区的太行山小流域径流及降雨过程，分析了径流与降雨的关系。
The design storm rainfall with short duration is an important data basis of small and middle water project design.
短历时设计暴雨是中小型水利工程设计的重要数据的依据。
The peak value of lightning frequency and rainfall period is consistent, the merger of medium and small scale rain cluster and low-layer convergence is one of the causes for short-term rainfall.
闪电频数与强降水时段的峰值较一致，中小尺度雨团合并和低层辐合是造成短时强降水的原因之一。
The variation of water and sand is studied under the influence of the rainfall and human activity, in the fore and after management of small watershed in gully region of the loess plateau.
以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
The result indicates that the underestimation of the rainfall rate during heavy rain and the overestimation during light rain become small by ZDR method.
结果表明，从相对误差来看，双线偏振雷达使普通雷达的小雨高估、大雨低估的测量误差趋势减弱，它对小到中雨的测量结果优于普通雷达。
All of them are quite different during past years. Interannual variability of annual rainfall shows the small-amplitude fluctuations and shocks, others show greater fluctuations and shocks.
年降水量的年际变化表现为小振幅波动震荡，其他的波动震荡较大且除梅年比外的震荡趋势很一致。
Taking Nverzhai small watershed in Wuling Mountain area as study area, the characteristics of runoff and sediment yield events based on 77 typical observed rainfall events in 2004—2008 were studied.
以武陵山区女儿寨小流域为研究区，根据流域2004—2008年77场典型降雨径流观测资料，研究流域次降雨径流与产沙特征。
Forest will reduce more runoff yield in strong and short term rainfall processes than in small and long ones.
对强降雨、历时短、产流率大的降雨过程，林地对产流削减作用明显小于对弱降雨、历时长、产流率小的降雨过程。
Forest will reduce more runoff yield in strong and short term rainfall processes than in small and long ones.
对强降雨、历时短、产流率大的降雨过程，林地对产流削减作用明显小于对弱降雨、历时长、产流率小的降雨过程。
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