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工程监测助力石漠化治理
2017-08-18 09:03:27 中国青年网
本报南宁讯 (记者/唐广生 通讯员/雷辉亮 谭盛辉)8月16日,记者从自治区地图院获悉,该院积极参与广西石漠化治理工程监测,已取得了阶段性成效:通过与全区各级林业部门合作,对监测区开展了多次现场踏勘,基本理清了监测工作流程和技术路径。
据介绍,广西岩溶土地分布广泛、发育典型,占全区土地总面积的37.8%。岩溶地区石漠化危害严重,制约了广西经济社会的可持续发展。今年初,自治区林业厅与自治区地图院就广西石漠化综合治理工程监测项目签订了合作协议。旨在通过开展专题地理国情监测,定期获取广西石漠化治理区的生态与社会经济状况相关数据信息,客观、科学评价治理工程实施效果,为各部门科学评价工程效益和宏观决策提供依据,为中央与广西各级政府石漠化综合治理决策提供科学依据。
按照项目分工,自治区地图院利用广西第一次地理国情普查成果,结合广西林业厅已开展的第三次石漠化监测工作,将地理国情监测成果应用于凌云、都安、天等、兴宾、阳朔等5个典型县石漠化治理项目效益监测。
经过技术人员的多次现场踏勘,目前基本理清监测工作流程和技术路径。即是以覆盖任务区的多源航空航天遥感影像数据为主要数据源,收集利用各类行业专题数据,通过图层叠加、时空对比分析、影像解译、外业调查、数学建模、建库、统计分析等技术与方法,实现基础性地理国情变化信息的快速、准确获取。通过集中建库、统计分析,形成基础性地理国情监测的系列数据、报告和图件成果,反映出研究区域的石漠化综合治理的生态状况变化及成效。
记者了解到,至今广西已开展了3次全区岩溶土地石漠化监测工作,基本掌握了全区75个石漠化县(市、区)内石漠化土地状况、分布及演变趋势,为顺利推进石漠化综合治理工程提供了本底数据。
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