In the past two decades, the supratidal wetland in the Yellow River Delta experienced severe saline-alkalization and vegetation degradation. Restoration with enclosure-freshwater release mode has prevailed since 2002. This method presented some positive effects, but need a massive freshwater supply. Furthermore, the subsequent formed single Phragmites australis vegetation weakened the bird habitation function. In this study, we developed another restoration mode based on microtopography modification. The core idea of the mode is to enhance micro-habitat heterogeneity thus improve the water resource temporal-spatial distribution and shape more niches. An ecological restoration program was designed and implemented since May, 2015. The monitoring data from July, 2015 to December 2017 showed that, with no extra artificially drained freshwater released, the soil salinity decreased by 15.4% to 30.8%. The area of bare land decreased while that vegetation and water surface increased, resulting in relative even land cover composition, habitat heterogeneity increased and thus the bird biodiversity improved. This mode is more ecological and water cost-effective and is suitable to restore the degraded saline-alkalized supratidal wetlands. However, long-term comprehensive monitoring is essential to evaluate the restoration effect. Many detailed parameters for topography modification need further optimized.

在过去的二十年中，黄河三角洲的上湿地经历了严重的盐碱化和植被退化。自2002年以来，采用封闭式淡水释放模式进行恢复一直很普遍。这种方法产生了一些积极的效果，但是需要大量的淡水供应。此外，随后形成的单个芦苇植被削弱了鸟类的栖息功能。在这项研究中，我们开发了另一种基于微形貌修改的恢复模式。该模式的核心思想是增强微生境的异质性，从而改善水资源的时空分布并塑造更多的生态位。自2015年5月起设计并实施了一项生态恢复计划。2015年7月至2017年12月的监测数据表明，由于没有释放额外的人工排水淡水，土壤盐分降低了15.4％至30.8％。裸地面积减少，植被和水面增加，土地覆盖物相对均匀，栖息地异质性增加，鸟类生物多样性得到改善。这种模式具有更高的生态效益和节水效益，适用于恢复退化的盐碱化的上湿地。但是，长期的全面监测对于评估修复效果至关重要。用于地形修改的许多详细参数需要进一步优化。