六盘山区水汽充裕，降水丰沛。在六盘山区选择典型的迎风坡和背风坡，合理布设各种观测设备和地基播云作业装备，设计地形云综合观测试验方案，开展地形云综合观测和人工催化外场试验；综合分析及融合外场试验各种观测数据和历史观测资料，并利用WRF模式进行数值模拟研究，揭示六盘山区地形云结构特征，确定该地区地形云播云作业条件和增雨潜力；根据不同的天气背景和地形云条件，分别进行地面烟炉播云试验和地面火箭播云试验，对比分析不同作业手段的播云结果，提高该地区地形云增雨催化作业技术；设计适合六盘山区地形云特点的基于地面降水量的统计检验方案和基于雷达观测或其它物理量观测的物理检验方案，评估六盘山区地形云播云作业的增雨效果，找出能够佐证地面增雨效果的云的宏微观物理量变化的物理证据。该项目将深化对六盘山区地形云结构及其降水机制的认识，促进该地区科学开发利用大气水资源，对改善区域生态环境具有重要科学意义和应用前景。

There are adequate water vapor and precipitation at Liupan Mountains. Comprehensive observations and orographic cloud seeding field campaign, with multiple observational facilities, ground-based cloud seeding equipments and rational designing scheme of observation, will be conducted at typical windward and lee slopes of Liupan Mountains. Observational data from field campaign and historically observational data will be combined and analyzed, and WRF model will be used in this study, to help well understand the structure and characteristics of orographic clouds at Liupan Mountains and determine the potential and operational condition for cloud seeding in this area. Besides, in order to explore the most suitable orographic cloud seeding techniques in this region, both methods of cloud seeding by ground-based generator and rockets will be compared and studied under different synoptic background and orographic condition. Both statistical methods based on precipitation data and physical methods using parameters derived from radar data or other measurements will be developed to evaluate the orographic cloud seeding effects. Physical evaluation may corroborate the statistical results and find the evidence of cloud microphysical changes induced by cloud seeding. This project will deepen the understanding of the structure and precipitation mechanism of the orographic clouds at Liupan Mountains and will promote the scientific exploitation and utilization of the water resource in the atmosphere. It has scientific significance and promising future on improving the regional ecological environment.