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1.
Christopher Legg 《Small-Scale Forestry》2003,2(2):211-223
A FLORES-type model in the Simile modelling environment is being developed for three villages in the Humid Forest Benchmark
area of southern Cameroon. The modelling project seeks to investigate the effects of introduction of new crop varieties and
improved farming systems on the long-term maintenance of stable mosaics of forest and agriculture, within the context of the
international Alternatives to Slash and Burn programme. Biophysical data have been collated, and socio-econnomic and tenure
data have been acquired in spatially-explicit ways. Maps of land-cover at village and benchmark scale are being prepared from
detailed and semi-detailed satellite imagery, using a nested legend system that allows linking of maps at different scales.
These data enable the initial construction and parameterisation of the model, and will permit the extrapolation of the results
of modelling from the villages to the benchmark, and ultimately to the whole of the Congo Basin humid forests. The prototype
version of the model involves 10 households and about 500 land patches, and includes the three agricultural systems dominant
in the southern more forested portion of the Benchmark (mixed food-fallow systems, forest melon fields, cocoa plantations)
with no rental, sale or other transfer of land. Decision-making at the household level is essentially modelled deterministically,
and labour productivity is assumed to be constant between households. This model is now complete, and once it has been adjusted
and suitably parameterised, it will be applied to real data from the three test villages. This will require the addition of
new farming systems, the introduction of modes of permanent or temporary transfer of land, and modification of the decision
model to render it more realistic.
The work described in this paper is a part of a project funded by the European Union through ICRAF and hosted at the IITA
Humid Forest Ecoregional Centre, Cameroon. The assistance of Valentina Robiglio (JPO GIS specialist), especially in preparation
of land-cover maps and in collection of socio-economic data, is gratefully acknowledged, as is the work of IITA ASB village
facilitators in collection of field data. The cooperation of IITA, IRAD, CIFOR and ICRAF scientists in providing data for
the model and periodically reviewing progress with the modelling process was essential to the progress achieved thus far. 相似文献
2.
基于GIS的福建省漳浦县森林资源分析 总被引:1,自引:0,他引:1
文章以漳浦县森林资源为对象,应用GIS技术,通过制作各类专题图,获取漳浦县森林的空间分布格局与结构组成信息,应用GIS的叠加、缓冲、统计等空间分析功能,探讨了土壤、地貌、坡度和海拔等地形特征因素对树种分布的关系。 相似文献
3.
在建立乡级林业地理信息系统(GIS)过程中,最主要的工作是设计并建立森林资源数据库。使用通用GIS软件(PCARC/INFO)和数据库管理系统软件(LOTUs1-2-3)设计森林资源数据库主要包括5个步骤:(1)将用户的观点模型化;(2)定义实体及其关系;(3)实体表示;(4)匹配成ARC/INFO的数据模型;(5)组织成地理数据集. 相似文献
4.
6.
Development of landslides in the Three Gorges Reservoir area is related to many factors. Lithology is one of the indispensable
internal factors, besides relative height differences, slope gradients and slope profiles. We used an information value model
with geographical information system (GIS) technology to study how lithology contributes to the development of landslides
from the Yunyang to Wushan segment in the Three Gorges Reservoir area and we quantify the relationship between lithology and
development of landslides. Via an investigation of 205 examples of past landslides, we found that the lithology of J3s, J3p and T2b contributes most. Our research results can provide a valid basis for future construction in the Three Gorges Reservoir area.
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Translated from Journal of Beijing Forestry University, 2007, 29(6): 138–142 [译自: 北京林业大学学报] 相似文献
7.
地理信息系统在森林资源管理与监测中的应用 总被引:7,自引:3,他引:7
在分析传统森林资源管理与监测的不足及利用地理信息系统(GIS)的优势的基础上,探讨了GIS在森林资源管理与监测中的应用,并指出建立以“3S”一体化的森林资源管理与监测体系是未来发展的必然趋势。 相似文献
8.
地理信息系统GIS及其在内蒙古林业勘察设计院的应用 总被引:1,自引:0,他引:1
纪玉珍 《内蒙古林业调查设计》2000,23(4):25-26,33
地理信息系统 ( GIS)作为信息化产业重要支柱之一 ,可将地理时空数据在遥感 RS、全球定位系统 GPS一体化基础上进行系统集成 ,呈应用服务面极广的信息产业 ,具有巨大的市场潜力。也是综合国力的一个方面。内蒙古林业勘察设计院地理信息系统 GIS的应用还属刚刚起步 ,需要继续加强新技术的开发和应用人才的培养 ,以提高内蒙古林业勘察设计院高新技术的应用水平 ,并促进科技进步 ,为内蒙古林业勘察设计院创造更好的经济效益 ,为我国林业事业的发展做出贡献 相似文献
9.
Sunshine is the key ecological factor for the growth, development, and reproduction of all green plants. Experience-oriented methods are the main approach in the stage of plant selection and configuration for landscape planning and design. However, our survey showed that this approach is unreliable in complex built-up environments. The objective of this research was to find a sound strategy for the selection and configuration of landscape plants, thereby ensuring their healthy growth and development. In this research, we adopted a geographic information system (GIS) as the technological platform, combined with a sunshine simulation and evaluation model, and a landscape plant database. The system can automatically retrieve and match landscape plants for different levels of solar radiation at specific geographic sites. This quantity-based assessment of the solar environment can overcome the drawbacks of the experience-oriented approaches, and can be used for landscape plant selection in the early stages of landscape planning and design, and also for their conservation and replacement. 相似文献
10.
Understanding fire is essential to improving forest management strategies. More specifically, an accurate knowledge of the spatial distribution of fuels is critical when analyzing, modelling and predicting fire behaviour. First, we review the main concepts and terminology associated with forest fuels and a number of fuel type classifications. Second, we summarize the main techniques employed to map fuel types starting with the most traditional approaches, such as field work, aerial photo interpretation or ecological modelling. We pay special attention to more contemporary techniques, which involve the use of remote sensing systems. In general, remote sensing systems are low-priced, can be regularly updated and are less time-consuming than traditional methods, but they are still facing important limitations. Recent work has shown that the integration of different sources of information and methods in a complementary way helps to overcome most of these limitations. Further research is encouraged to develop novel and enhanced remote sensing techniques. 相似文献