| 1. | Study on relation between underlying surface and river runoff
下垫面与河川径流的关系研究 |
| 2. | The influence of human activities on river runoff rises notably
无定河流域河川径流的人类活动影响程度在显著上升。 |
| 3. | The decline of river runoff indicates the obvious trend of environmental aridity in the region
流域河川径流来源于降水，全球变化是河流径流量变化的背景。 |
| 4. | The season changes of the river flows and its response to soil and water conservation have been researched
分析了河川径流量的季节变化规律及其对水土流失治理的响应。 |
| 5. | The difference between the calculation and water resources assessment has been mainly introduced in the paper
通过介绍还原水量计算方法，阐述了河川径流量与水资源量的区别。 |
| 6. | The paper also proposed a new method to build a comprehensive precipitation - runoff model based on soil and water conservation practices
黄土高原水土保持对河川径流及土壤水文的影响提出了建立基于水土保持措施的流域降水产流模型的新方法。 |
| 7. | These models can be used to estimate impact of control measures on river runoff , and to what degree these measures effect the runoff production in river catchments at any given year
该模型能分离水土流失综合治理对河川径流量的作用大小，并可估算任一年份水土保持措施对降雨产流量的影响程度。 |
| 8. | With the impact of climate change and increasing the intensity of human activities , the hydrological regime has changed , including annual runoff distribution , which is relating with water resources management and ecological construction
摘要在气候变化和人类活动的影响下，河川径流的年内分配特征也发生变化，直接影响人类开发利用和生态环境建设。 |
| 9. | According to hydrochemistry monitoring material of northwest rivers in recent five years , and compared with the first northwest rivers water resources investigation appraisal result in 80 ’ s of last century , we analyzed the main rivers hydrochemistry condition , runoff degree of mineralization , total hardness and the hydrochemistry type distribution
根据近5a来对西北诸河的水化学监测资料，统计出了主要河流水化学状况；分析了河川径流矿化度、总硬度和水化学类型的地区分布，并与20世纪80年代第一次西北诸河水资源调查评价的结果进行了比较。 |
| 10. | Research manifests that : ( 1 ) allocation in the year of precipitation is very uneven , and yearly precipitation is different in great scope , negative anomaly of precipitation appear concentratly in the 1990s , the precipitation in the 1990s decreased in different degree ; ( 2 ) close positive correlation exists between runoff and precipitation , runoff is abundant in the year with prolific precipitation , and generally in the year with scarce rain the volume of runoff is not enough ; ( 3 ) there is 20 % margin in their changes amplitude , this mainly resulted from high frequent human activities
结果表明： ( 1 )流域内降水年内分配极其不均；年际变化剧烈，进入90年代后降水负距平集中出现， 20世纪90年代降水较多年均值有较大程度的减少； ( 2 )流域内河川径流与降水之间存在密切的正相关关系，降水量多的年份，河川径流丰富，反之较枯； ( 3 )河川径流积极响应降水的变化，然而河川径流变化幅度却比降水变化幅度大20 % ，这个偏差主要是由于频繁的人类活动的干扰造成的。 |
