著者
Yoshihiko KARTYA Shuji IWATA Tetsuya INAMURA
出版者
The Association of Japanese Geographers
雑誌
地理学評論 (ISSN:13479555)
巻号頁・発行日
vol.78, no.12, pp.842-852, 2005-10-01 (Released:2008-12-25)
参考文献数
15
被引用文献数
2 2

In Cotahuasi and Puica, southern Peru, contrasting landforms of wide plateaus with glacigenic U-shaped valleys (4, 800-5, 000 m ASL) and deep canyons (1, 500-2, 800 m deep from plateaus) are developed. In this area, camelid (alpaca and llama) pastoralism and agriculture have been conducted on the plateaus and in the canyons, respectively, since at least Inca times. This paper describes meso- to micro-scale landforms comprising the plateaus and canyons, and discusses the factors controlling pastoral-agricultural land use of these specific landforms. On the plateaus, flood plains, fluvial terraces, alluvial fans, taluses, and landslide bodies, which are concentrated in the U-shaped valleys, are significant for alpaca pastoralism. These landforms provide relatively gentle slopes, and are covered by wet meadows for livestock if adequate water is supplied by channels or springs. In the canyons, landslide bodies, taluses, alluvial fans, and fluvial terraces are important for agriculture. These landforms also produce gentle places, and are used even if irrigation or channels are absent. The regional/local climate would be the primary factor for the vertical separation between pastoralism and agriculture. Additionally, the physiographical setting, in particular the slope angle, is potentially important for the pastoral-agricultural land use of meso-to micro-scale landforms.
著者
岩田 修二 白石 和行 海老名 頼利 松岡 憲知 豊島 剛志 大和田 正明 長谷川 裕彦 Decleir Hugo Pattyn Shuji Iwata Kazuyuki Shiraishi Yoritoshi Ebina Norikazu Matsuoka Tsuyoshi Toyoshima Masaaki Owada Hirohiko Hasegawa Hugo Decleir Frank Pattyn
雑誌
南極資料 = Antarctic Record (ISSN:00857289)
巻号頁・発行日
vol.35, no.3, pp.355-401, 1991-11

第32次南極地域観測隊(JARE-32)夏隊のセールロンダーネ山地地学調査隊は, 1990年12月24日あすか観測拠点を出発し, 1991年2月7日に再び「あすか」に帰り着くまでセールロンダーネ山地中央部で, 地形・地質・雪氷調査を行い測地作業も実施した。雪上車とスノーモービルを利用してキャンプを移動しながら調査するという従来と同じ行動様式をとったため, 設営面でもおおかたはこれまでの方式と同じである。地学調査は, 地形では, 野外実験地の撤収, 岩石の風化の調査, モレーン・ティルのマッピング, 地質では, 構成岩石の形成順序の解明, 構造地質学的・構造岩石学的そして地球化学的研究のためのサンプリング, 測地では, 重力測量, 地磁気測量, GPSによる基準点測量が行われた。ベルギーからの交換科学者は氷河流動・氷厚などを測定した。The Sor Rondane field party as part of the summer party of the 32nd Japanese Antarctic Research Expedition (JARE-32) carried out geomorphological, geological, geodetic, and glaciological fieldworks in the central area of the Sor Rondane Mountains for 45 days from December 24,1990 to February 7,1991. The field trip was conducted by two parties, consisting of 9 persons, traveling from mountains to mountains to shift tented camps using 4 snow vehicles towing their equipments on sledges behind. Nine snowmobiles (motor toboggans) were used for their field researches on glaciers. Geomorphologists carried out measurements in the periglacial field experimental sites, observations of rock weathering, and mapping of chronological sequence of tills and moraines. Geologists studied chronological sequence of rock formation and collected rock specimens for structural, petrological, and chemical analyses. A surveyor set up geodetic control stations using GPS satellite positioning system and made gravity surveys on glaciers as well as at some control stations. Two Belgian glaciologists took part in the fieldwork as exchange scientists and studied dynamics of glacier movement and ice thickness.