Verbesserung der Wasserversorgung und Hygiene in Trockengebieten Kenias Improvement of Water Supply and Hygiene in drought prone Areas in Kenya Verbesserung der Wasserversorgung und Hygiene in Trockengebieten Kenias Improvement of Water Supply and Hygiene in drought prone Areas in Kenya Verbesserung der Wasserversorgung und Hygiene in Trockengebieten Kenias Improvement of Water Supply and Hygiene in drought prone Areas in Kenya