環境地理学セミナー　12/11

Dear all,

Good afternoon.

This is an announcement of the upcoming Environmental Geography Seminar.

There will be 4 presenters. Three students will do a paper review, and one student will report his study progress.

Please see all the details carefully below.

【Date】11 December. Wed. （Time: 15:00~）

【Place】 D201

【Content】

Presenters

(1). Wang Ting (Paper review)

Title: A classification of backcountry campsites in Prince William Sound, Alaska, USA
Authors: Christopher A. Monz and Paul Twardock
Journal : Journal of Environmental Management 91 (2010) 1566-1572 doi:10.1016/j.jenvman.2010.02.030
Abstract: This study examined resource conditions on backcountry campsites in Prince William Sound, Alaska, USA. In order to further the understanding of campsite impacts and to improve monitoring and assessment methods, we employed a multivariate analysis procedure, suggested in one study, but heretofore untested on data from other campsite assessments. Factor analysis of ten impact indicator variables from 146 campsites produced three dimensions of campsite impacted tree and vegetation disturbance, areal disturbance and visitor behavior-related disturbance. Three types of campsites, which differed substantially in the types of impact exhibited, were then derived from a cluster analysis of the factor scores. Further analysis revealed a significant relationship between the types of substrates where campsites were located and the types of campsites derived from the analysis. This work illustrates the utility of multi-indicator monitoring approaches and the use of multivariate methods for classifying campsites, as the campsite types identified would likely require different management strategies for limiting the proliferation and expansion of impacts.

(2) Kawisha Mutimba (Paper review)

Title: Land use and land cover change detection using geospatial techniques in the Sikkim Himalaya, India
Author: Prabuddh Kumar Mishra , Aman Rai , Suresh Chand Rai
Journal: The Egyptian Journal of Remote Sensing and Space Sciences
Abstract: Mapping and monitoring of land use land cover (LULC) changes in the Himalayas is vital for sustainable development, planning and management. Based on remote sensing (RS) and geographic information sys-tem (GIS) techniques, the study is an attempt to monitor the changes in LULC patterns of Rani Khola watershed of Sikkim Himalaya for the periods 1988–1996, 1996–2008 and 2008–2017. Images from Landsat-5 Thematic Mapper (TM) and Sentinel 2A (Multispectral Instrument) MSI data were used to extract land cover maps. Supervised classification using Maximum Likelihood Classifier (MLC) was applied to prepare LULC maps of the watershed. The accuracy of the classified map was assessed using a High Resolution Planet scope image and ground realities have been verified and ascertained through field observations and site specific interviews. As a result of policy changes and traditional agroforestry systems, LULC in the study watershed has undergone a series of complicated changes over the past three decades. Six major LULC classes viz; agriculture, barren land, built-up area, dense forest, open forests and water bodies have been identified and indicate that major land use in the watershed is forestry. Results shows, dense forest, built-up area and water bodies have increased by 16.40% (41.76 km2), 2.13% (5.41 km2) and 0.11% (0.28 km2) while open forest, agriculture and barren land have decreased by 13.98% ( 35.59 km2), 2.83% ( 7.22 km2) and 1.82% (0.4.64 km2) respectively. The analysis and find-ings of the study highlights important policy implications for the sustainable LULC management in the Rani Khola watershed of the Sikkim Himalaya.

(3) Michinobu Namatame (Study progress)

Title: Factor analysis of soil erosion and understanding of spatial distribution characteristics in farmland in the Mokoto River basin
Abstract:
Agricultural areas that extend into the Mokoto River basin have benefited food production in the Okhtsk region of Hokkaido. In the downstream area, Lake Mokoto, where fishery such as yamatoshijimi and smelt has been practiced since ancient times, is located in the upstream area. And in this basin with a vast agricultural area, it is known for its high productivity of wheat and potato, but it has been plagued by soil erosion in the field due to post-harvest rainfall and snow melting. A large amount of muddy water flows into Lake Mokoto as if accompanied, and shallow and eutrophication phenomena of the lake bottom have been confirmed. Shallowing can be a serious issue for marine resources inhabiting Lake Mokoto. Especially in 2016, heavy storms caused heavy erosion damage to farms throughout the basin, resulting in significant economic damage, such as a decrease in the number of harvests and renovation work on eroded fields. In the future, it will be necessary to implement agricultural conservation measures in consideration of abnormal weather throughout the basin from a comprehensive perspective.
Therefore, the purpose of this study was the following two points.
1. To clarify the geographical characteristics of the distribution of agricultural land affected by soil erosion in the basin.
2. To clarify topographic factors that induce soil erosion in the field.
The soil erosion of farmland in 2016 was confirmed using Google Earth Pro, and the location of the erosion was marked based on aerial photographs. (Fukumoto and Shindo, 2016) Then, natural geographical conditions and human geographical conditions are extracted at each erosion location, and the relationship between each element and field erosion is clarified using spatial statistical methods. The primary purpose of this research is to promote measures against soil erosion that occurs in farmland and to contribute to the development of agriculture within the Okhotsk region.

(4) Cui Song (Paper review)

Title: An inventory of glacial lakes in the Third Pole region and their changes in response to global warming
Journal: Global and Planetary Change 131 (2015) 148–157
Author: Guoqing Zhang, Tandong Yao, Hongjie Xie, Weicai Wang, Wei Yang
Abstract: No glacial lake census exists for the Third Pole region, which includes the Pamir-Hindu Kush-KarakoramHimalayas and the Tibetan Plateau. Therefore, comprehensive information is lacking about the distribution of and changes in glacial lakes caused by current global warming conditions. In this study, the first glacial lake inventories for the Third Pole were conducted for ~1990, 2000, and 2010 using Landsat TM/ETM+ data. Glacial lake spatial distributions, corresponding areas and temporal changes were examined. The significant results are as follows. (1) There were 4602, 4981, and 5701 glacial lakes (N0.003 km2) covering areas of 553.9 ± 90, 581.2 ± 97, and 682.4 ± 110 km2 in ~1990, 2000, and 2010, respectively; these lakes are primarily located in the Brahmaputra (39%), Indus (28%), and AmuDarya (10%) basins. (2) Small lakes (b0.2 km2) are more sensitive to climate changes. (3) Lakes closer to glaciers and at higher altitudes, particularly those connected to glacier termini, have undergone larger area changes. (4) Glacier-fed lakes are dominant in both quantity and area (N70%) and exhibit faster expansion trends overall compared to non-glacier-fed lakes. We conclude that glacier meltwater may play a dominant role in the areal expansion of most glacial lakes in the Third Pole. In addition, the patterns of the glacier-fed lakes correspond well with warming temperature trends and negative glacier mass balance patterns. This paper presents an important database of glacial lakes and provides a basis for long-term monitoring and evaluation of outburst flood disasters primarily caused by glacial lakes in the Third Pole.

2. Note this:

Please send me detailed information about your presentation at least 5 days before your turn.

For a paper review: title and author of the paper, journal name, which volume, pages, also the link (if possible) should be provided.

If a paper written in Japanese is going to be presented, please kindly send me the information both in Japanese and English.

【Notice】

※ In case you are absent from the seminar or late for the seminar, please contact Professors or me in advance. Any absence without permission is not allowed;

※ Please be punctual (very important);

※ Please do your full preparation for the seminar;

※ Your active participation is always appreciated;

※ Please feel free to contact me if you have any questions or comments.

Best Wishes & Regards.

Sun