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Forest fires are natural disasters that can occur suddenly and can be very damaging, burning thousands of square kilometers. Prevention is better than suppression and prediction models of forest fire occurrence have developed from the logistic regression model, the geographical weighted logistic regression model, the Lasso regression model, the random forest model, and the support vector machine model based on historical forest fire data from 2000to 2019 in Jilin Province. The models, along with... 相似文献
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依据森林燃烧环理论,在充分考虑指标代表性、不可替代性以及数据可得性的基础上,根据江西省林火发生特点,选取气候、植被、地形等11个因子作为江西省森林火险精细化综合区划指标,并按照各区划因子对林火发生或蔓延的影响赋予不同的权重,将全省划分为Ⅰ级(低火险)、Ⅱ级(中火险)、Ⅲ级(高火险)3个不同等级的森林火险区.分区结果与该区气候、植被、地形分布等相符,说明区划结果具有较好的科学性和实用性,可为江西省森林火灾的预防、扑救和重点防护与管理等提供科学依据. 相似文献
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Forest fires caused by natural forces or human activities are one of the major natural risks in Northeast China. The incidence and spatial distribution of these fires vary over time and across the forested areas in Jilin Province, Northeast China. In this study, the incidence and distribution of 6519 forest fires from 1969 to 2013 in the province were investigated. The results indicated that the spatiotemporal distribution of the burnt forest area and the fire frequency varied significantly by month, year, and region. Fire occurrence displayed notable temporal patterns in the years after forest fire prevention measures were strictly implemented by the provincial government. Generally, forest fires in Jilin occurred in months when stubble and straw were burned and human activities were intense during traditional Chinese festivals. Baishan city, Jilin city, and Yanbian were defined as fire-prone regions for their high fire frequency. Yanbian had the highest frequency, and the fires tended to be large with the highest burned area per fire. Yanbian should thus be listed as the key target area by the fire management agency in Jilin Province for better fire prevention. 相似文献
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以吉林省1969-2017年森林火灾资料为依据,利用Excel绘制折线图,对吉林省6种主要森林火灾火源的时间变化特征进行了研究。结果表明:吉林省6种主要火源引起的森林火灾都具有明显的季节性特点,即主要发生在春秋两季,但是针对野外生活用火火源在2月也要注意防范;祭祀用火火源引起的森林火灾主要发生在4月的白天;纵火火源和野外生活用火火源引起的森林火灾在白天发生频繁,但是在夜晚人们防范意识薄弱期间也有发生;境外烧入火源引起的森林火灾有明显的“滞后”性,主要发生在下午和晚上。针对农事用火和野外吸烟,要在春秋两季进行全天候重点防范。 相似文献
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Douglas J. McRae 《林业研究》2011,22(3):437-446
Climate warming has a rapid and far-reaching impact on forest fire management in the boreal forests of China. Regional climate model outputs and the Canadian Forest Fire Weather Index (FWI) Sys- tem were used to analyze changes to fire danger and the fire season for future periods under IPCC Special Report on Emission Scenarios (SRES) A2 and B2, and the data will guide future fire management planning. We used regional climate in China (1961 1990) as our validation data, and the period (1991-2100) was modeled under SRES A2 and B2 through the weather simulated by the regional climate model system (PRECIS). Meteorological data and fire danger were interpolated to 1 km 2 by using ANUSPLIN software. The average FWI value for future spring fire sea- sons under Scenarios A2 and B2 shows an increase over most of the region. Compared with the baseline, FWI averages of spring fire season will increase by 0.40, 0.26 and 1.32 under Scenario A2, and increase by 0.60, 1.54 and 2.56 under Scenario B2 in 2020s, 2050s and 2080s, respectively. FWI averages of autumn fire season also show an increase over most of the region. FWI values increase more for Scenario B2 than for Scenario A2 in the same periods, particularly during the 2050s and 2080s. Average future FWI values will increase under both scenarios for autumn fire season. The potential burned areas are expected to increase by 10% and 18% in spring for 2080s under Scenario A2 and B2, respectively. Fire season will be prolonged by 21 and 26 days under ScenariosA2 and B2 in 2080s respectively. 相似文献
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《林业研究》2019,(6)
Forest fires are influenced by several factors,including forest location, species type, age and density,date of fire occurrence, temperatures, and wind speeds,among others. This study investigates the quantitative effects of these factors on the degree of forest fire disaster using nonparametric statistical methods to provide a theoretical basis and data support for forest fire management.Data on forest fire damage from 1969 to 2013 was analyzed. The results indicate that different forest locations and types, fire occurrence dates, temperatures, and wind speeds were statistically significant. The eastern regions of the study area experienced the highest fire occurrence,accounting for 85.0% of the total number of fires as well as the largest average forested area burned. April, May, and October had more frequent fires than other months,accounting for 78.9%, while September had the most extensive forested area burned(63.08 ha) and burnt area(106.34 ha). Hardwood mixed forest and oak forest had more frequent fires, accounting for 31.9% and 26.0%,respectively. Hardwood-conifer mixed forest had the most forested area burned(50.18 ha) and burnt area(65.09 ha).Temperatures, wind speeds, and their interaction had significant impacts on forested area burned and area burnt. 相似文献
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本文概要介绍了吉林省生态环境概况、林业建设成就与问题,论述了本省森林生态网络建设面临的任务及亟待解决的八个方面的问题,并对生物技术、信息技术、新材料技术及无公害森林保健技术在森林生态网络建设的应用前景进行了展望。参9。 相似文献
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经营森林理念及其在吉林省的应用研究 总被引:1,自引:0,他引:1
本文提出了经营森林理念,并阐述了在市场经济条件下经营森林的内涵及与传统的森林经营的区别;分析、总结了经营森林理念在吉林省实施“三大区域战略”,即东部“大森林”、中部“大粮仓”、西部“大草原”的应用实践与经验;吉林林业走的是生态建设产业化、产业发展生态化的道路,探索出了生态与经济协调发展、经济与生态双重产出的符合吉林省林情的发展模式。 相似文献
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云南松林区的林火与火险等级分区初探 总被引:1,自引:0,他引:1
云南松林区发生的森林火灾是多种自然因素和人为活动综合作用的结果。通过对四川省云南松分布区不同区域与林火有关的主要气候因子分析及综合值的比较,结合地形地貌、植被状况和人为活动等多种因素,将我省云南松分布区划分成5个不同等级的火险区,并提出了相应的护林防火对策。 相似文献
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A. Mosseler B. Pendrel W. Wang NIU Yan-zhang Y.S. Park GAO Chang-qi SONG Li-wen 《林业研究》2005,16(4):331-334
This paper reviews various forestry practices in Jilin Province, China. The authors emphasize the rich natural diversity of Jilin and the need to focus research efforts on understanding the potential of native species to meet the needs of land-management agencies involved in forest resource exploitation and ecological restoration. The native species of China hold great potential, and deserve more research attention, for meeting these needs. The introduction and testing of exotic species should be dbne only under rigorous scientific testing and after comparison with native species prior to operational introduction into forestry in order to avoid unwanted ecological consequences, including potential problems with alien invasives and pest introductions. The authors also emphasize the need to maintain viable (e.g., genetically diverse and reproductively fit) natural populations of native species in order to protect China's valuable natural diversity and maintain the potential of native species to function as future seed sources for local forest and ecological restoration activities. 相似文献
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吉林省森林防火体系发展模式的研究 总被引:2,自引:1,他引:1
本文立足于吉林省的实际,以有效控制重大森林火灾发生和大力提高应变能力为体系建设战略目标,采用关键要素评价矩阵法评析森林防火体系现状、筛选主导子系统,研究提出了吉林省森林防火体系建设战略发展模式总体构架和分区系统模式,并以原始林区为例,对不同区域系统配置要点进行探讨,为森林防火建设提供参考依据。 相似文献
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汪清县林业局于2004年开展了最新一次的森林有害生物调查,结果表明,全县共有森林有害生物325种,其中:病害16种、害虫286种、害鼠5种、有害植物18种。调查发现光肩星天牛已传入汪清县境内并有所扩散,成为林木的重大潜在有害生物。对兴安落叶松鞘蛾、落叶松枯梢病等主要有害生物的种类和发生规律进行了分析,提出了防治对策。 相似文献
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本文通过对吉林市连续20年森林火灾损失的价值评估测算,从中可以看出,由于20年来的有效保护,未发生重、特大森林火灾,给吉林市旅游、环保业及农牧业等方面都带来了具大的、潜在的社会效益、生态效益。 相似文献
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