本文關(guān)鍵詞：基于SOFM神經(jīng)網(wǎng)絡(luò)模型的土地類型分區(qū)嘗試——以青藏高原東部樣帶為例，，由筆耕文化傳播整理發(fā)布。

基于SOFM神經(jīng)網(wǎng)絡(luò)模型的土地類型分區(qū)嘗試——以青藏高原東部樣帶為例

Zoning by land types based on SOFM network： A case study on transect of eastern Tibetan Plateau

[1] [2] [3] [4]

ZHANG Xueru, ZHANG Yili, LIU Linshan, ZHANG Jiping （1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2. University of Chinese

[1]中國科學(xué)院地理科學(xué)與資源研究所,北京100101; [2]中國科學(xué)院大學(xué),北京100049

文章摘要：基于土地類型自下而上的自然區(qū)劃能夠確立更加清晰的自然區(qū)劃界線,是自然區(qū)劃研究取得突破的關(guān)鍵。以青藏高原東部山區(qū)為研究區(qū),采用神經(jīng)網(wǎng)絡(luò)模型與GIS技術(shù),開展基于土地類型自下而上的區(qū)劃研究。通過計算得到研究區(qū)地形綜合指數(shù)、溫暖指數(shù)、濕潤指數(shù)、地被指數(shù)和水文指數(shù)5個自然指數(shù)指標(biāo),并將這些指標(biāo)作為變量輸入層,輸入到建立的Self-Organizing Feature Maps神經(jīng)網(wǎng)絡(luò)模型中,對土地類型單元自下而上合并,生成青藏高原東部山區(qū)自然區(qū)劃圖,實現(xiàn)以土地類型單元為控制本底的定量化分區(qū)。結(jié)果表明：①可以將土地類型單元聚合成高原高寒稀疏植被區(qū)、高原高寒草甸草原區(qū)、高原高寒灌叢草甸區(qū)、高山深谷灌叢草甸區(qū)和高山深谷針葉林區(qū)5個自然帶區(qū)域。②分區(qū)結(jié)果與中國生態(tài)地理區(qū)域劃分的自然界線比較接近,相似性較高,分區(qū)結(jié)果較理想。

Abstr：The bottom-up physical regionalization based on land type units can establish more clear boundaries, which is dramatic breakthroughs of research in physical regionalization. The study area is located in the mountainous areas of eastern Tibetan Plateau. The research on bottom-up physical regionalization based on land type units is implemented by means of a combined method of SOFM network models and GIS. Topographic index, warmth index, humidity index, LCI index and hydrological index can be seen as input layer variables, and land type units and natural zones are regarded as background and regionalizing target. The results show that： （1） the land types are aggregated into five natural regions, namely alpine sparse vegetation plateau, alpine meadow plateau, alpine shrub-meadow plateau, alpine shrub-meadow in mountain-valleys, and coniferous forestland in mountain-valleys. （2） The boundaries of this zoning are close to scheme of ecological regionalization in China. Therefore, the results of network classification show that there is high concentration at spatial scale, which represents natural geographical characteristics in the mountainous areas of eastern Tibetan Plateau. This study can provide new ideas and methods for bottom-up physical regionalization based on land type units.

文章關(guān)鍵詞：

Keyword：:SOFM network land types physical regionalization transect of eastern TibetanPlateau GIS

課題項目：國家自然科學(xué)基金項目（40901057,40771206）; 國家重點基礎(chǔ)研究發(fā)展計劃（2010CB951704）致謝：感謝中國科學(xué)院地理科學(xué)與資源研究所鄭度研究員、申元村研究員和李秀彬研究員對研究工作的指導(dǎo).

  本文關(guān)鍵詞：基于SOFM神經(jīng)網(wǎng)絡(luò)模型的土地類型分區(qū)嘗試——以青藏高原東部樣帶為例，由筆耕文化傳播整理發(fā)布。