摘要
本文简要介绍了水土流失定量遥感方法的组成和基本原理,重点叙述了它在山东全省山丘区的应用作业和应用结果,并讨论了它的准确性、实用性和应用前景等。该法的监测模型可与美国近年刊出的RUSLE相媲美,且其因子算式算法系由我国实例资料所建,故有更合我国流失实际的应用效果,尤其它适用于遥感和GIS数据的微机处理。其应用结果,不仅有比常规调查法和定性遥感法更准确实用的流失总量、各级面积的统计数据和流失现状图,而且还有流失治理规划的防治强度预报图,山东全省山丘区微机作业历时一年余,达到了预计目标,还建立了全省山丘区80510.96km2流失信息库。首次定量遥感监测结果为:年均流失总量12724.01万吨;轻度以上侵蚀面积30724.97km2;强度以上侵蚀面积7156.00km2;需治理面积4240。21km2(含急需治理674km2).9个拦河水库汇水区监测的年均流失总量与水文站实测算得的年均淤积量有83%的一致性,且更符合近十年的流失治理实际,则表明定量遥感方法的监测结果可靠。
: In this paper, a quantatative remote sensing method for soil erosin
losses isbriefly introduced, and its operation and application in the mountain and hilly areas
ofShandong Province, China are described. Although the model form of this method
formonitoring soil erosion losses is the same as that of the (American) RUSLE, theformula and
algorithms for model factors are generated from the loss data observed inChina Therefore, the
method is more applicable to loss regions in our country and issuitable for personal computers
to process the data of GIS and remote sensing. It is amore accurate and practical method
compared with the conventional survey methodand the qualitative remote sensing method. The
results of its application include thetotal loss of region, the area of different grades of soil loss,
the soil erosion map,and the forecast map of soil conservation. The total losses monitored by
thequantitative remote sensing method are conformable to the deposition values observedand
calculated by hydrometric stations in the 9 reservoir valleys with an averageaccuracy of
82.96%, showing the accuracy of the monitoring results obtained by thismethod in Shandong
Province (see Table 2).
出处
《土壤学报》
CAS
CSCD
北大核心
1999年第1期1-8,共8页
Acta Pedologica Sinica
基金
国家自然科学基金
关键词
定量遥感
监测模型
像元流失量
水土流失
Monitoring model, Quantitative remote sensing method, Soil
lossof pixel