Rice terrace expansion by ethnic minorities of the Vietnamese Northern Uplands and their livelihood sustainability

2013 Fiscal Year Final Research Report

• Project/Area Number: 23520972
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Human geography
• Research Institution: Tohoku University
• Principal Investigator: ISODA Yuzuru 東北大学, 理学(系)研究科(研究院), 准教授 (70368009)
• Co-Investigator(Kenkyū-buntansha): KIM Doo-chul 岡山大学, 大学院環境学研究科, 教授 (10281974)
• Project Period (FY): 2011 – 2013
• Keywords: 山岳地帯 / 棚田 / 農業 / 地域研究 / 人口扶養力 / 少数民族 / GIS / リモートセンシング

Research Abstract

Analysis of land use change based on satellite image and farm household survey in upland area of Sapa, Vietnam revealed that (1) rice terrace expanded and roughly doubled since the 1970s and is still expanding; (2) newer rice terraces are developed on steeper slopes; (3) rice yeilds are not necessarily low in those newer paddies, depending on chemical fertilizer use and amount; (4) ethnic minorities in the area adopted hybrid rice that doubled the yield; (5) cash income from tourism and cardamon sales are contributing to modernization of subsistence farming, in buying seeds, fertilizers and machines; (6) despite rapid population growth of 3% per annum for the last 40 year, agricultural extensification and intensification enabled output growth exceeding the population growth.

Research Products

• [Journal Article] Terraced paddy expansion in Sapa in response to rapid population increase : remote sensing since the 1970s and accuracy assessment based on fieldwork (2012)
  • Author(s): Isoda Y, Nguyen Huu Ngu, Kim DC,他4名
  • Journal Title: アジア開発途上国との大学・行政機関連携による持続可能社会構築の協力事業、活動報告書(岡山大学大学院環境学研究科) Pages: 48-55
• [Journal Article] Verification of robust regression approach in land use classification without ground data : a case of terraced paddy development in Sapa, Vietnam (2011)
  • Author(s): Isoda Y, Kim DC,他2名
  • Journal Title: 地理情報システム講演論文集 Volume: 20(CD-ROM)
• [Presentation] Rice terrace expansion, productivity, and the roles of tourism in Sapa, Vietnam (2013)
  • Author(s): Yuzuru ISODA, NGUYEN Huu Ngu, NGUYEN Huu Van, Tatsuya KANDA, Yukio YOTSUMOTO, Doo-Chul KIM
  • Organizer: IGU 2013 Kyoto Regional Conference
  • Place of Presentation: Kyoto International Conference Center (Kyoto, Japan)
  • Year and Date: 2013-08-09
• [Presentation] ベトナム北部サパにおける棚田の拡大とその生産性 (2013)
  • Author(s): 磯田弦・Nguyen Huu Ngu・神田竜也・四本幸夫・Nguyen Huu Van・金枓哲
  • Organizer: 2013年度東北地理学会春季学術大会
  • Place of Presentation: 仙台市戦災復興記念会館(仙台市)
  • Year and Date: 2013-05-19
• [Presentation] Rice terrace expansion and their productivity in Sapa, Vietnam (2013)
  • Author(s): Yuzuru Isoda, Nguyen Huu Ngu, Yukio Yotsumoto, Nguyen Huu Van, Doo-Chul Kim,他4名
  • Organizer: LEGATO Conference Hanoi 2013
  • Place of Presentation: Army Hotel (Hanoi, Vietnam)
  • Year and Date: 2013-04-16
• [Presentation] ベトナム・サパの少数民族による棚田の拡大についての研究におけるGIS利用 (2012)
  • Author(s): 磯田弦
  • Organizer: 地理情報システム学会東北支部研究交流会
  • Place of Presentation: 東北大学片平キャンパス(仙台市)
  • Year and Date: 2012-12-11
• [Presentation] 観光地確立初期における商店の形成 (2012)
  • Author(s): 四本幸夫, Nguyen Huu Van, Nguyen Huu Ngu,磯田弦,他2名
  • Organizer: 第85回日本社会学会大会
  • Place of Presentation: 札幌学院大学第一キャンパス(札幌市)
  • Year and Date: 2012-11-04
• [Presentation] Terraced paddy expansion by ethnic minorities in Sapa, Vietnam : Identifying locations and measuring productivity (2012)
  • Author(s): Yuzuru Isoda, Ngu Huu Nguyen, Yukio Yotsumoto, Doo-Chul Kim,他3名
  • Organizer: International Geographical Conference (IGC) Cologne 2012
  • Place of Presentation: University of Cologne (Cologne, Germany)
  • Year and Date: 2012-08-30
• [Presentation] Identifying terraced paddy field expansion with robust regression approach in remote sensing : a case of Sapa, Vietnam (2012)
  • Author(s): Yuzuru ISODA, Doo-Chul KIM,他3名
  • Organizer: International Scientific Conference on"Sustainable Land Use and Rural Development in Mountain Areas"
  • Place of Presentation: Hoheheim University (Stuuttgart, Germany)
  • Year and Date: 2012-04-18
• [Presentation] Terraced paddy expansion in Sapa in response to rapid population increase : remote sensing since the 1970s and accuracy assessment based on fieldwork (2012)
  • Author(s): Yuzuru ISODA, NGUYEN Huu Ngu, Doo-Chul KIM,他4名
  • Organizer: Symposium on Exchange and Cooperation Programmes for Promotion and Development of the Education, Science and Technology, and Culture of Developing Countries in the Asia-Pacific Region
  • Place of Presentation: Okayama University International House Lounge (Okayama, Japan)
  • Year and Date: 2012-02-02
• [Presentation] Verification of robust regression approach in land use classification without ground data : a case of terraced paddy development in Sapa, Vietnam (2011)
  • Author(s): Isoda Y, Kim DC
  • Organizer: 第20回地理情報システム学会学術研究発表大会
  • Place of Presentation: (鹿児島大学、鹿児島市)
  • Year and Date: 2011-10-15
• [Presentation] ベトナム北部の山間少数民族による棚田開発:予備的調査結果 (2011)
  • Author(s): 磯田弦・神田竜也・グエン・ホウ・グー・金どぅ哲
  • Organizer: 日本地球惑星科学連合2011年度連合大会
  • Place of Presentation: (幕張メッセ国際会議場、千葉市)
  • Year and Date: 2011-05-27