The topographic nature of Makkah, Saudi Arabia, hinders most of the urban development and expansion activities except on the foothills of the mountains, where most of the already developed and ongoing/planned new settlements occur. Al-Hussainiyah area is one of many unplanned settlements that has been constructed along the course of Wadi Uranah flood plain. The area has been affected by many flash floods events over the past years, which resulted in a considerable amount of property damage. Rapid mitigation measures for such area are important to avoid future flash flood losses. The current research uses all the available fieldwork, meteorological, and remote sensing data to predict the surface water runoffs from modeled rainfall storms of returning periods of 10, 25, 50, and 100 years. The modeling results revealed that the average surface water runoffs from the modeled storms are 194.5, 247.7, 284.8, and 318 million m³ running at maximum speeds of 7578, 9610, 11,014.3, and 12,260.9 m³/s respectively. The results also indicate that the current flood course of Wadi Uranah at Al-Hussainiyah area will not be able to accommodate these volumes of water at its given speeds and will case devastated damage to the settlements of the area unless this course is expanded to accommodate the volume of water generated from at least one of the designed storms.

沙特阿拉伯麦加的地形性质阻碍了大部分城市开发和扩张活动，除了山脚下，大多数已经开发和正在进行/计划中的新定居点都发生在那里。Al-Hussainiyah 地区是沿 Wadi Uranah 洪泛平原沿线建造的许多计划外定居点之一。过去几年，该地区遭受了多次山洪暴发的影响，造成了相当大的财产损失。这些地区的快速缓解措施对于避免未来的山洪损失很重要。当前的研究使用所有可用的野外工作、气象和遥感数据来预测来自 10、25、50 和 100 年重现期的模拟降雨风暴的地表水径流。^{3 分别}以 7578、9610、11,014.3 和 12,260.9 m ³ /s 的最大速度运行。结果还表明，目前在 Al-Hussainiyah 地区的 Wadi Uranah 洪水路线将无法以给定的速度容纳这些水量，并将对该地区的定居点造成破坏性破坏，除非该路线扩大以适应至少一种设计风暴产生的水量。