An assessment of the impact of silviculture and forest management regimes to forest cover change in the Churia region during 1992 to 2014

Banko janakari Pub Date : 2018-07-17 DOI:10.3126/BANKO.V27I3.20540

B. Pokharel, D. Uprety, R. Niraula, Prabhat Pokharel

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引用次数: 3

Abstract

A study was conducted in the Churia region in 2014 to assess the change in forest cover as an outcome of the performance of various forest management regimes and silvicultural practices with the main objective to find the gap between those two. Geographic Information System (GIS) and Remote Sensing (RS) were used to compare the satellite imageries for the period of 1992 to 2014 in order to analyse the state of forest cover change. The demarcation of community forest boundaries was conducted based on available boundary maps and transferred to Google earth and GIS platform. Results showed that overall forest cover in the Churia region was increased by 7500 ha (1%) in 22 years, i.e. 1.35 million ha (76%) in 1992 to 1.36 million ha (77%) in 2014. The rate of deforestation in the Churia region was reduced as compared to the national average. However, degradation of landscape was visible at riverbeds and cultivation lands close to the riverbeds. It was also found that the area of dense forest was increased by 42,000 ha, whereas the area covered by bushes and grassland was reduced by 39,000 ha. The study further showed that there was a decline in cultivated land by 20,000 ha. Comparing the forest cover change in community forests with that of other management regimes, silvicultural practices in community forest areas have brought relatively better positive changes in the forest condition. It may be due to periodic silviculture operations carried out collectively by local communities. In the assessment, however, various elements of tenure rights and responsibilities of community, government and private forest and tree owners were identified and key silvicultural practices adopted by these regimes were highlighted as the drivers of positive or negative outcomes of forest cover change. Banko JanakariA Journal of Forestry Information for Nepal Special Issue No. 4, 2018, Page : 36-44

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1992 - 2014年丘利亚地区造林和森林管理制度对森林覆盖变化的影响评价

2014年在Churia地区进行了一项研究，以评估各种森林管理制度和造林实践绩效导致的森林覆盖变化，其主要目标是找到两者之间的差距。利用地理信息系统(GIS)和遥感(RS)对1992 - 2014年的卫星影像进行对比，分析森林覆盖变化状况。在现有边界图的基础上进行群落森林边界的标定，并将其传输到谷歌earth和GIS平台。结果表明:22年间，丘利亚地区森林总覆盖面积增加了7500 ha(1%)，从1992年的135万ha(76%)增加到2014年的136万ha (77%);与全国平均水平相比，丘里亚地区的森林砍伐率有所下降。河床和靠近河床的耕地景观退化明显。密林面积增加4.2万公顷，灌丛和草地面积减少3.9万公顷。研究进一步表明，耕地减少了2万公顷。与其他经营制度相比，社区林区的造林措施对森林状况的积极影响相对较好。这可能是由于当地社区集体进行的定期造林作业。然而，在评估中，确定了社区、政府和私人森林和树木所有者权属权利和责任的各种要素，并强调了这些制度采用的关键造林做法是森林覆盖变化的积极或消极结果的驱动因素。《尼泊尔林业信息》2018年第4期特刊，第36-44页

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Banko janakari

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