The research of soil moisture difference using the delaying effect of the precipitation on the vegetation

Author

Zhou, Yuyu ; Zhu, Qijiang ; Sun, Rui

Author_Institution

Res. Center for Remote Sensing, Beijing Normal Univ., China

Volume

4

fYear

2002

fDate

2002

Firstpage

2214

Abstract

A new method to analyze the differences of soil moisture in an area is advanced. Soil moisture is related closely to vegetation growth. An experiment was conducted in the Yellow River Basin in China. The change of vegetation cover is the result of many factors. We postulate that soil moisture in the Yellow River Basin is mainly determined by the precipitation. The delaying effect of the precipitation on the vegetation cover was analyzed in the Yellow River Basin using the cross partial correlation index between precipitation and NDVI. The cross partial correlation index has already excluded the impact of temperature on vegetation cover. Different delaying effects represent different soil moisture. The delaying interval can be adapted to measure soil moisture difference at different levels. On the basis of the above result, the difference of soil moisture in the Yellow River Basin was analyzed, and the difference map of soil moisture in the Yellow River Basin was made.

Keywords

atmospheric precipitation; moisture; soil; vegetation mapping; AVHRR data; China; EROS-EDC; January 1982 to December 1998; NDVI; Yellow River Basin; cross partial correlation index; normalized difference vegetation index; precipitation delaying effect; surface soil moisture; temperature; vegetation cover; vegetation growth; weather stations; Delay effects; Large-scale systems; Moisture measurement; Remote monitoring; Remote sensing; Rivers; Soil measurements; Soil moisture; Temperature; Vegetation mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International

Print_ISBN

0-7803-7536-X

Type

conf

DOI

10.1109/IGARSS.2002.1026498

Filename

1026498