河源区 meaning in English

headwater region
headwaters region
stream source area

Water quality assessment in upstream hun river by aquatic - bios investigation
浑河源区水生生物与水质评价
Analysis of rainfall - runoff factor change of the source regions of the yellow river with supporting of gis
支持下的黄河河源区降水径流要素变化分析
The patch , cor - ridor , matrix , edge are the main elements according to remote sensing information and material from regional geological mapping in headstream region ， and based on the spatial structure features of soil erosion on three scales
根据黄河河源区地质调查所获实际资料和遥感影象信息，从3个不同的等级层次对河源水土流失的空间结构特征进行了研究。