摘要
利用航空像片及其成像原理，在立体坐标量测仪上恢复沙漠景观的地面立体模型，并分别对巴丹吉林沙漠内典型区域的各种形态沙丘的示量指征进行高精度的量测。通过沙丘的各种数量指标的运算，分析沙丘的示量指征及其形态特征，提出了较高精度的、有效的沙丘测量方法，从而为沙漠从定性到定量的研究提供了可行的量测手段。最后通过巴丹吉林沙漠沙丘示量指征的量测和分析，展示巴丹吉林沙漠北部沙丘的分布规律。
The quantitative method for dunes morphology study is used popularied by more and more desert researchers. But dunes morphological parameters are mostly eastimated from topography map in the past years. Thus, more effective data cannt be obtained and studies to middle and small dunes become more difficult. In the paper, a method which makes use of stereo comparator to measure the dunes model is put forward. By this method, high accuracy parameters of dunes morphology such as length, wideth, height and diameter etc. can be obtained. The step of the method is that: at first, to put pairs of stereo mate on stereo comparator and to establish photogrammetric stereomodel of studied dune; then to measure and calculate the parameters of dunes morphology. The Badain Jaran Desert is famous for its giant megadune. Dunes mophology includes longitudinal sand ridge, crescent dune and barchan chain, complex dune, compound megadune and star dune. By appling the method put forward in the paper, the acuracy morphology parameters of these five types dune in the northern area of Badain Jaran Desert are obtained. The results provid reliable references about dunes dynamic evolution and forming mechanism etc.. The method is a simple and feasible scientific approach. Its acuracy is higher than that of the other methods before. A great of acuracy data can be got in the condition of no field investigation.
出处
《中国沙漠》
CSCD
北大核心
1998年第4期354-358,共5页
Journal of Desert Research
基金
中国科学院"九五"重大课题
