海南岛湿地调查数据对比研究

Comparative Study onWetland Survey Data in Hainan Island

为了评估第三次全国国土调查结果中海南岛湿地数据的真实性和合理性,以第三次全国国土调查和海南岛湿地资源现状试点调查结果作为研究对象,通过分析、对比其湿地定义和湿地分类标准,对海南岛湿地资源现状试点调查中的湿地类型细化,进行了湿地斑块实地调查,对比海南岛湿地资源现状试点调查与第三次全国国土调查得到的湿地数据,分析了海南岛各类型湿地面积变化的原因。研究结果表明,可以将海南岛湿地资源现状试点调查中的5类34型湿地细化为5类34型40细化分型湿地,其中,21种湿地细化分型与第三次全国国土调查中的有关湿地的土地类型形成了对应关系;海南岛湿地资源现状试点调查得到的湿地面积(54141.53 hm^(2))比第三次全国国土调查的湿地面积(56208.09 hm^(2))少2066.56 hm^(2),其中,红树林、森林沼泽、灌丛沼泽、沿海滩涂和内陆滩涂的面积分别减少了373.85 hm^(2)、2.47 hm^(2)、75.32 hm^(2)、1370.94 hm^(2)和284.19 hm^(2),这主要是湿地现状的改变(包括湿地的季节性变化和人类对湿地的利用)使湿地类型发生变更所致。

To evaluate the authenticity and rationality of the wetland survey data in Hainan Island in the third national land survey results,a comparative study was conducted using the results of the third national land survey and the pilot survey of wetland resources in Hainan Island.Through the analysis and comparison of wetland definitions and classification standards,the wetland types in the pilot survey of wetland resources in Hainan Island were refined,and on-site investigations were conducted for wetland patches.The data of wetlands in Hainan Island obtained from the pilot survey were compared with those obtained from the third national land survey,and the reasons for changes in areas of the wetland of different types in Hainan Island were analyzed.The results showed that the 5 categories and 34 types of the wetlands in the pilot survey of wetland resources in Hainan Island could be refined into 5 categories,34 types,and 40 subtypes of the wetlands.Among them,21 types of the wetland subtypes corresponded to the land types of relevant wetlands in the third national land survey.The area of the wetlands obtained from the pilot survey of wetland resources in Hainan Island(54141.53 ha)was 2066.56 ha less than that obtained from the third national land survey(56208.09 ha),and the areas of mangroves,forest swamps,shrub swamps,coastal tidal flats,and inland tidal flats decreased by 373.85 ha,2.47 ha,75.32 ha,1370.94 ha,and 284.19 ha,respectively.The changes in wetland types were mainly due to seasonal changes of the wetlands and human use of wetlands.