@article { author = {Qasim, Samah and Youns, Abdulwahab and Mahmood-Agha, Omar}, title = {Testing of the Homogeneity of Precipitation Time Series in Selected Regions of Iraq}, journal = {Al-Rafidain Engineering Journal (AREJ)}, volume = {25}, number = {1}, pages = {126-137}, year = {2020}, publisher = {College of Engineering, University of Mosul, IRAQ}, issn = {1813-0526}, eissn = {2220-1270}, doi = {10.33899/rengj.2020.127033.1035}, abstract = {Precipitation data are subject to many tests and assessments before being used for studies in the field of water resources, hydrological processes, and climate change research to ensure their reliability and quality. Homogeneity tests are considered as a useful tool to control the reliability and quality of data. In this study, a homogeneity test was performed for the monthly rainfall data distributed over different regions of Iraq. Homogeneity was examined using four tests: Pettit, SNHT, BRT and VNRT at a confidence level of 5%.The results showed that the time series for the winter months of the Ramadi, Baghdad, Hilla, Khanaqin and Karbala stations were heterogeneous, while the time series of the Al-Nakhaib, Wetba, Baghdad and Tal Afar stations during the spring months were statistically heterogeneous according to the SNHT test. While the Pettitt test showed heterogeneous results for the stations of Nasiriyah, Basra, Khanaqin and Kirkuk for the winter months. Al-Rutba, Khanaqin, Tal Afar,Sinjar,Mosul and Karbala for the spring months. The data for all stations were homogeneous, using the BRT test for the winter and spring months. VNRT test showed the heterogeneity of the data for the Samawah stations for the months of winter, Ramadi, Nakhab, Tal- Afar and Najaf for the months of spring. The current study also showed that the precipitation of all stations are classified as useful, with the exception of the Al-Nukhaib and Najaf stations, which have been classified as doubtful .}, keywords = {Homogeneity tests,standard normal homogeneity tests,Buishand range test, Pettitt test,Von Neumann ratio, Rainfall time series}, title_ar = {فحص التجانس لسلاسل الأمطار فی مناطق مختارة من العراق}, abstract_ar = {تعتبر اختبارات التجانس أداة مفیدة للتحکم فی موثوقیة البیانات وجودتها. تم اجراء اختبار التجانس لبیانات هطول الأمطار الشهریة ل 18 محطة موزعة على مناطق مختلفة من العراق للفترة من 1981-2018. استخدمت اربعة اختبارات لفحص التجانس وهی Pettit وSNHTوBRT وVNR. اجری الاختبار عند مستوى ثقة 5%. بینت النتائج أن السلاسل الزمنیة لأشهر فصل الشتاء لمحطات الرمادی وبغداد والحلة وخانقین وکربلاء غیر متجانسة بینما کانت لمحطات النخیب والرطبة وبغداد وتلعفر خلال أشهر فصل الربیع غیر متجانسة من الناحیة الاحصائیة حسب اختبار SNHT. اظهر اختبار Pettit نتائج غیر متجانسة لمحطات الناصریة والبصرة وخانقین وکرکوک لأشهر الشتاء والرطبة وخانقین وتلعفر وسنجار والموصل وکربلاء لأشهر الربیع. کانت بیانات جمیع المحطات متجانسة باستخدام اختبارBRT لأشهرفصل الشتاء والربیع. اما اختبارVNRT فبین عدم تجانس بیانات محطات السماوة لأشهر فصل الشتاء والرمادی والنخیب وتلعفر والنجف لأشهر فصل الربیع. أوضحت النتائج ان جمیع المحطات تصنف على انها مفیدة باستثناء محطة النخیب والنجف التی صنفت أنها مشکوک فیها.}, keywords_ar = {التجانس,Pettitt,Buishand,SNHT,VNRT,السلاسل الزمنیة للأمطار}, url = {https://rengj.mosuljournals.com/article_167013.html}, eprint = {https://rengj.mosuljournals.com/article_167013_a088f98d6224b652d146ebb9cac4eb12.pdf} }