تصنيف الغطاء النباتي الطبيعي في حوض وادي المجيريش با ستخدام تقنية الاستشعار عن بعد

الملخص EN

Introduction Dominated of remote sensing application the study of urban areas and ground wealth and forests and agricultural areas with less attention with arid and semi-arid plant as basin of wadi Mijirish , and at present time a growing international trend for the use of remote sensing technology and appointment in the field of environmental control, especially in the case of space image support to verification ground through the field study to ensure compatibility with their counterparts in satellite image, which is researcher try to applied in this research, the wadi mijirish basin located in south-east of Mecca with length about 22 km and occupies an area of about 216 km, is one of the most important basins that feed mainstream for wadi Al-Numan and called his Numan in many maps.

The aim of study : This study aimed to Linking remote sensing data with the measure field data, to determine the usefulness of relying on space visual data in the form of a study the spatial organization of vegetation in the area of research, through automation of the American satellite information, land sat TM5.

Analysis of spectral response pattern for vegetation communities in the basin of wadi Mijirish.

Applying some Vegetation indices selected for understanding different reflection spectral for plant communities in the basin of wadi mijirish.

Produce thematic map for plant communities in the basin of wadi Mijirish.

The plan of research summarize as follow : The classification of vegetation cover with routine study depend on field measurement with qualitative survey and measure the qualitative survey and then statistical analysis of the data, to determine the dominant plant species in each plant community through the results of the field of statistical data, to determine the dominant plant species in each plant community through the results of the field study, or what is called ground truth data has been selected method central point between (point centered quarters method).

Signed field sampling points specified already by GPS on the cross- sectional image subset for basin of wadi Mijirish , to present major differences of vegetation cover by using false color composite (FSS) for band single to separate the natural vegetation field and cultivated.

Spectral Fingerprint analysis for the plant communities especially the method of analyzing the principal components, in addition to calculate spectral means for each plant community to analyze repercussions of the various spectral sampling sites.

Applied set of spectral indices to show differentiation between soil and plant as relative image to understand and analyze the fields of some rays in the form of vegetation indices used in field of control of plant changes , and find vegetation change value such as (ratio of B4 / B3 and soil Adjusted vegetation index (SAVI) control index presumption plant amended, and NDVI to perpetrate with arid & semi-arid environments used indices of controlling vegetation rate (MSAV I2) to measure the change in vegetation.

produce thematic Map of plant communities through supervised classification to research area.