Degradation and loss of forest land and land-use changes in Sarawak, East Malaysia: a study of native land use by the Iban

2009 ◽  
pp. 403-413
Author(s):  
Masahiro Ichikawa
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Forest Land ◽  
Native Land ◽  
East Malaysia

scholarly journals Integration of GIS and Markov chain model for land use change assessment: A case study in the upstream Ba river basin, Gia Lai province

2021 ◽  
Vol 20 (04) ◽  
pp. 69-77
Author(s):  
Huyen T. Nguyen
Keyword(s):  
Land Use ◽  
Markov Chain ◽  
Land Use Change ◽  
River Basin ◽  
Land Use Planning ◽  
Land Use Changes ◽  
Chain Model ◽  
Forest Land ◽  
Change Assessment ◽  
South Central

Ba river is the biggest river system in the South-Central Coast of Vietnam and plays a significant role in the socio-economic development of the region. Recently, land-use changes in Gia Lai province have been significantly transformed. Hence, to provide the information for land-use planning, there is an urgent need for land-use change assessment in the upstream Ba river basin. This study employed the Markov chain coupled with GIS to assess land-use changes between 2010 - 2015 and 2015 - 2020 periods. The results showed that during the period 2010 - 2015, there was no significant conversion of agricultural and reserve forest land. Meanwhile, a large proportion of unused (86%) and water and aquacultural land (57.5%) was converted into the other land-use types. Between 2020 and 2015, unused land decreased while the surface water and aquacultural land increased. The forest land accounted for a significant area (51.16%) during the 2015 - 2020 period. In addition, the driving forces leading to these changes were also analyzed, providing a more comprehensive of land-use change in the study area. In general, GIS and Markov were suitable for assessing land-use change. This study outcomes provide a general framework for land-use planning in Gia Lai province.

scholarly journals Changes in forest land use and management in Sabah, Malaysian Borneo, 1990–2010, with a focus on the Danum Valley region

2011 ◽  
Vol 366 (1582) ◽  
pp. 3168-3176 ◽  
Author(s):  
Glen Reynolds ◽  
Junaidi Payne ◽  
Waidi Sinun ◽  
Gregory Mosigil ◽  
Rory P. D. Walsh
Keyword(s):  
Land Use ◽  
Forest Management ◽  
Forest Restoration ◽  
Large Scale ◽  
Land Use Changes ◽  
Natural Forests ◽  
Forest Land ◽  
Conservation Area ◽  
Forest Reserves ◽  
The North

In an earlier special issue of this journal, Marsh & Greer summarized forest land use in Sabah at that time and gave an introduction to the Danum Valley Conservation Area. Since that assessment, during the period 1990–2010, the forests of Sabah and particularly those of the ca 10 000 km 2 concession managed on behalf of the State by Yayasan Sabah (the Sabah Foundation) have been subject to continual, industrial harvesting, including the premature re-logging of extensive tracts of previously only once-logged forest and large-scale conversion of natural forests to agricultural plantations. Over the same period, however, significant areas of previously unprotected pristine forest have been formally gazetted as conservation areas, while much of the forest to the north, the south and the east of the Danum Valley Conservation Area (the Ulu Segama and Malua Forest Reserves) has been given added protection and new forest restoration initiatives have been launched. This paper analyses these forest-management and land-use changes in Sabah during the period 1990–2010, with a focus on the Yayasan Sabah Forest Management Area. Important new conservation and forest restoration and rehabilitation initiatives within its borders are given particular emphasis.

scholarly journals Perubahan Lahan Pertanian dan Kehutanan di Kota Langsa dalam Kurun Waktu 10 Tahun (2007-2016)

2018 ◽  
Vol 3 (4) ◽  
pp. 897-906
Author(s):  
Siti Rahmatika ◽  
Syakur Syakur ◽  
Muhammad Rusdi
Keyword(s):  
Land Use ◽  
Mangrove Forest ◽  
Satellite Images ◽  
Land Use Changes ◽  
Rice Fields ◽  
Forest Land

Abstrak. Penelitian ini bertujuan untuk melihat perubahan penggunaan lahan pertanian dan kehutanan yang terjadi di masing-masing Kecamatan yang ada di Kota Langsa dalam waktu 10 tahun, mulai dari tahun 2007 sampai 2016. Teknik yang digunakan yaitu digitasi pada citra satelit Kota Langsa masing-masing tahun 2007 dan 2016 pada aplikasi Arc.Gis 10.3. Hasil penelitian didapatkan ada empat kelas lahan pertanian dan kehutanan yaitu persawahan, perkebunan, tambak, dan kehutanan yaitu hutan mangrove dengan  total perubahan lahan keseluruhan di Kota Langsa yaitu 210,09 ha dengan rincian per kecamatan yakni Kecamatan Langsa Timur 47,19 Ha, Langsa Lama 35,68 ha, Langsa Barat 62,86 ha, Langsa Baro 48,87 ha, dan Langsa Kota 15,49 ha.The Changes of Agricultural and Forest Land Use in Langsa City During 10 years (2007 – 2016)Abstract. The research aim is to study the changes in agricultural and forest land use that occurred in each sub-district of Langsa City within 10 years, started from 2007 to 2016. The change of land use detected by observing and digitizing the satellite images of Langsa City in 2007 and 2016 with the Arc.Gis 10.3 application. The results showed that there were four classes of agricultural dan forest land namely rice fields, plantations, ponds, and forestry, namely mangrove forest, with total of land use changes in Langsa city is 210.09 ha i.e. Langsa Timur 47.19 ha, Langsa Lama 35.68 ha, Langsa Barat 62.86 ha, Langsa Baro 48.87 ha, and Langsa Kota 15.49 ha.              

scholarly journals Pemodelan Perubahan Tataguna Lahan Terhadap Debit Banjir DAS Tanggul, Jember Menggunakan Model SWAT (Soil and Water Assessment Tool)

2020 ◽  
Vol 14 (2) ◽  
pp. 154-161
Author(s):  
Diah Ainunisa ◽  
◽  
Gusfan Halik ◽  
Wiwik Yunarni Widiarti ◽  
◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Rainy Season ◽  
Model Calibration ◽  
Assessment Tool ◽  
Swat Model ◽  
Land Use Changes ◽  
Forest Land ◽  
Water Assessment ◽  
Soil And Water

Population growth is one of the causes of land-use change that can increase runoff. Tanggul watershed is one of the watersheds which often overflows during the rainy season. This study purpose to analyze the effect of land-use changes on runoff in Tanggul watershed using SWAT (Soil and Water Assessment Tool) model. To make sure the performance of SWAT model calibration and classified by the value of NSE and R2. The result of calibration included in a good category and validation included in a very good category. This study was modeling forest land-use change in 2004-2017 to determine the effect of land-use change on runoff. The result in this model of forest land-use change can increase runoff.

scholarly journals PENERAPAN METODE PENGINDERAAN JAUH DAN SISTEM INFORMASI GEOGRAFIS UNTUK ANALISA PERUBAHAN PENGGUNAAN LAHAN (Studi Kasus: Kawasan Danau Maninjau)

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Afrital Rezki
Keyword(s):  
Land Use ◽  
Satellite Images ◽  
Descriptive Analysis ◽  
Land Use Changes ◽  
Image Interpretation ◽  
Remote Sensing Image ◽  
Survey Method ◽  
Forest Land ◽  
The West ◽  
Main Activity

Studies of changes in land use is very important, because changes in land use have an impact on the physical and social environment. The purpose of this study was to determine the use and change of spatial land in the area of Lake Maninjau by using satellite images and research in the field. The method used is the method of remote sensing image interpretation, survey method and descriptive analysis based spatial. Land use has changed between 1989 and 2014. The use of the forest land is the largest change is an area of 1989 ha 32.350.59, 27.580.50 20.175.93 ha ha in 2002 and 2014. The pattern of land use changes spatially in Region Maninjau follow the main activity of most of the population in agriculture. Most forest land is converted. Forest land converted to mixed farms are the most extensive in Nagari Tanjung Sani on the west side of the lake Maninjau (30 565 ha) and in Nagari Sungai Batang in the east of the lake Maninjau (31 831 ha).Keywords: changes in land use, satellite images, field checks, the Lake Maninjau

scholarly journals Quantifying the Compound Factors of Forest Land Changes in the Pearl River Delta, China

2021 ◽  
Vol 13 (10) ◽  
pp. 1911
Author(s):  
Xinchuang Chen ◽  
Feng Li ◽  
Xiaoqian Li ◽  
Yinhong Hu ◽  
Panpan Hu
Keyword(s):  
Land Use ◽  
Pearl River Delta ◽  
Land Use Changes ◽  
Pearl River ◽  
Economic Factors ◽  
Forest Land ◽  
The Pearl River Delta ◽  
Main Factors ◽  
The Pearl River ◽  
Land Changes

Forestland has been a focus of urbanization research, yet the effect of urbanization on forest land change on an urban agglomeration scale still remains unclear. Screening and quantifying the main factors affecting forest land changes have practical significance for land planning and management. Considering the characteristics of the region and referring to related studies, 26 natural, social, and economic factors were screened in the Pearl River Delta (PRD), where land-use changes are intense. Geographically weighted regression and the relative importance were used to quantify the spatial heterogeneity of these main factors. There was still a large area of deforestation evident in the PRD with its afforestation area of 604.3 km2 (mainly converted from cropland) and a deforestation area of 1544.6 km2 (mainly converted from built-up land). The effects of socio-economic factors were the main factors for these forest land changes, especially the rural population and migration. Deforestation mainly occurs in urban growth boundaries, which will be the focus area for further land management. These main factors have the potential to provide a methodological contribution to land-use changes, and the results of this study can provide a solid theoretical basis for forest land management and urban planning (e.g., balancing expansion of built-up land and ecological protection that advances forest land protection and restoration).

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