During the land usage, a series of problems occur time to time, such as irrational land use structure, low degree of intensive usage, land resource degradation, serious loss of arable land.
在土地利用中，用地结构不合理、集约利用程度低、土地资源退化、耕地流失严重等一系列问题时有发生。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
Land Resource Management In River Valley and Flood Prone Areas of Himalayan Region: Land Degradation, Floods, Runoff, Sediment Yields, Soil and Water Conservation.
喜马拉雅地区流域和洪水易发地区土地资源管理：土地退化，洪水，径流，泥沙的产量，水土保持。
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