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Abstrak :
Uses of microorganisms in the civil engineering domain have been developed since several years ago. From several researches, microorganisms produced calcite was able to improve the mechanical properties of the soil and concrete. In the soil, they could increase the bearing capacity by producing calcite that would fulfill the pores of soil [Ivanov, 2008]. By reducing the pores, the soil will be more compact and it can increase its capacity. On the concrete material, it could be used to fix the cracking in the concrete or it could [Achal et.al. 2010] be used in mix design which able to improve the strength of concrete. The type of the bacteria which can produce calcite is from genera Bacillus. Growth of Bacillus subtilis studied in this paper was observed in laboratory of Microbiology at Universite Lille 1.

Abstrak :
ABSTRAK
Isu terbesar di abad ini adalah tentang berubahan iklim dan pemanasan global. Efek dari perubahan iklim adalah perubahan dari musim yang biasanya menjadi tidak terprediksi dengan baik di dunia, diamana bias terjadi kondisi ekstrim seperti hujan yang sangat lebat maupun kekeringan yang panjang, kondisi ini sangat berpengaruh terhadap muka air tanah. Untuk mendapatkan dan mngetahui secara baik fase secara fisika dari nilai kohesi dari tanah dan kestabilan terhadap lereng akibat dari infiltrasi air dan naiknya muka air tanah maka dibuatlah model untuk mendapatkan nilai kemanan berdasarkan variasi nilai kohesi dan kemiringan menggunakan model numeric Flac 3D. Dan hasil digambarkan dalam fariasi angka keamaan berdasarkan total kohesi dan variasi kemiringan dalam kondisi tidak jenuh.

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Abstract
Recently, one of the biggest challenges in this century is climate change and global warming. The climate change effect has changed that condition from the regular season to be unpredictable season on the word, where the more extreme conditions such as heavy rain falls and droughts. So To find out and well understanding the physical phases of value of cohesion of soil and slope stability due to water infiltration and rising water table we make the several models to fine FoS due to variation of cohesion and variation of inclination by using software Flac3d. And the result illustrated some of FoS in variation of total cohesion and variation of inclination angle for unsaturated condition.