【作者】 罗鹏；

【导师】 王珂；

【作者基本信息】 浙江大学 ， 农业遥感与信息技术， 2006， 硕士

【摘要】 随着全球人口激增、经济迅速发展,土地资源日趋紧张,解决这个问题的有效途径之一就是加快土地后备资源开发,其中低丘红壤是浙江省最重要的农业用地后备资源之一。 本文以浙江省兰溪市为例,在3S技术的支持下,利用SPOT5遥感影像、1:1万DEM、土壤图、土地利用现状图、以及土壤分析数据和统计年鉴等资料,对兰溪市低丘范围内红壤资源进行了调查,并在调查的基础上,选取了相关的12个评价因子,采用3种模型对兰溪市低丘红壤资源开发利用潜力进行了综合评价,探讨综合应用3S技术进行低丘红壤资源调查和开发利用潜力评价的技术和方法,为浙江省低丘红壤资源的合理开发提供参考依据。论文的主要研究结果包括以下几个方面: (1) 植被覆盖度遥感监测。在前人研究成果的基础上,本研究选取了土壤调节植被指数(MSAVI)和阴影指数(SI)为基础,借鉴FCD模型,构建了一个能够削弱土壤影响和阴影的复合植被指数(VI),然后采用混合像元法对研究区植被覆盖度进行了估算。新的复合植被指数适合在低丘缓坡红壤资源地区应用,能够有效地削弱土壤、阴影等背景信息的影响,植被覆盖度遥感监测精度较好。 (2) 低丘红壤资源调查。在3S技术支持下,对兰溪市低丘范围内红壤资源进行了调查,确定了兰溪市低丘地区坡度分布、高程分布、土地利用现状、土壤类型和植被覆盖状况等,同时进行了土壤侵蚀强度遥感监测,分析了坡度和高程对土壤侵蚀强度的影响。 (3) 低丘红壤资源开发利用潜力评价。利用低丘红壤资源调查结果,构建低丘红壤资源开发利用潜力评价指标框架,采用指数和、指数积和综合评判物元模型3种方法进行开发潜力综合评价,并对3种方法的优缺点进行了比较分析。结果表明:综合评判物元模型在评价中减少了人为主观因素的影响,使评价结果的精确度和准确度得到了提高,更能反映土地资源客观特征,其评价结果更为真实可靠,具有推广应用的价值。更多还原

【Abstract】 Agricultural land resource is decreasing rapidly in Zhejiang province because of the population explosion and economic development. The utilization of the low hill red soil is one of the key strategy to ensure the agricultural production.The thesis took Lanxi city of Zhejiang province as a case study. Based on the 3S technology , the low hill red soil resource was investigated by using the Spot5 image, 1:10000 DEM, the map of soil and land use, and the database of low hill red soil area has been established. The land utilization potential has been assessed by 3 methods based on investigation results, which provided scientific references for the rational utilization of low hill red soil. The main results were summarized:(1) Vegetation fraction estimation. On the basis of the FCD model, the study selected Modified Soil Adjusted Vegetation Index (MSAVI) and Shadow Index (SI) to establish a new vegetation index VI which can decrease the influence of shadow and soil interference. Then vegetation fraction was estimated using mixed pixel model. The results showed that: the new vegetation index was suitable for the low hill red soil area, and it can also decrease the influence of shadow and soil interference.(2) The investigation of low hill red soil area. Based on the 3S technology, the low hill red soil resource of various slope and elevation was investigated, and land use was interpreted by visual interpretation while the vegetation fraction was calculated. The effects of the slope and elevation in the area have been analyzed, and the soil erosion has been evaluated.(3) Utilization potential evaluation of low hill red soil. The index system of low hill red soil utilization potential evaluation has been constructed by using the results of investigation of low hill red soil resource, and the utilization potential has been evaluated using 3 models: exponential sum, exponential product extraction and matter-element model. The comparison of 3 models’ results showed that: the matter-element model can reduce the effects of man-made factors in the process of evaluation, and the evaluation results were more precise which can show the characteristic of the land resource better. In a word, it was valuable for practical application.更多还原