1． Marine Science and Environment Faculty，Hodeidah University，Yemen 2． Geological Survey and Mineral Resources Board，Sana'a，Yemen

The coastline changes along Yemen's the Red Sea ( Al-muka，Al-khohah，Al-tiaf，Ras Katib and Al- Urji spits) were studied using a series of landsat images ( MSS，TM and ETM + ，1972，1989，2000，2006) ， coupled with geomorphological，sedimentological and meteorological findings． Comparison of satellite images provided a viable means for establishing long-term coastal changes ( accretion and erosion) as observed in the studied spits ( Al-Urj，Ras Sham，Ras Maemoon，Ras Katib，Al-Mandar，Nukhaylah，Mujamilah，Ras Ashab Abu-Zahr and Mukha) ． The rate of the spit accretion has the greatest value up to 89 pixel /year corresponding to 72 290 m2 /year in Mukha，while the spit erosion shows greatest value up to 131 pixel /year corresponding to 106 404 m2 /year in Mujamilah． The patterns of accretion and erosion along the spits depend on the spit direction， natural processes mainly of wave-induced longshore currents，the sediments supply and depth of sea．