Girls carrying water at the Doro refugee camp in Maban, Upper Nile state in South Sudan. Female refugees and humanitarian agencies say that the risk of physical and sexual assault while collecting water or firewood is one of the gravest safety ad security concerns faced by female refugees. According to the UNHCR, the United Nations refugee agency, girls (under 18) are 32 percent of the entire Blue Nile refugee population registered in the four camps in Upper Nile state, South Sudan.