نتایج جستجو برای: mann kendall

تعداد نتایج: 22938  

Journal: :محیط شناسی 0
محمدجواد امیری استادیار گروه برنامه ریزی و مدیریت و آموزش محیط زیست، دانشکدۀ محیط زیست، دانشگاه تهران، ایران، عبدالرضا کرباسی دانشیار گروه مهندسی محیط زیست، دانشکدۀ محیط زیست، دانشگاه تهران، ایران محمود ذوقی دانشجوی کارشناسی ارشد گروه برنامه ریزی و مدیریت و آموزش محیط زیست، دانشکدۀ محیط زیست، دانشگاه تهران، ایران مهدیس سادات دانشجوی کارشناسی ارشد گروه برنامه ریزی و مدیریت و آموزش محیط زیست، دانشکدۀ محیط زیست، دانشگاه تهران، ایران،

introduction: climate change is one of the most significant challenges in sustainable development that has negative effects on land and marine ecosystems. this phenomenon leads to imbalances that cause effects including hydrological changes, increased soil erosion, increased runoffs and reduced groundwater aquifer feeding, etc. effects of climate changes over the past decade have significantly ...

2002
Robin T. Clarke

The widely-used hydrological procedures for calculating events with T-year return periods from data that follow a Gumbel distribution assume that the data sequence from which the Gumbel distribution is fitted remains stationary in time. If non-stationarity is suspected, whether as a consequence of changes in land-use practices or climate, it is common practice to test the significance of trend ...

Journal: :Mausam 2022

Climate change is a natural phenomenon but in present decades its variability of mainly due to anthropogenic activities alarming. Agriculture Chhattisgarh state dependant on monsoon rain and distribution. Considering this fact, the study has been tried analyze most important climatic variables, viz., precipitation temeperature for analyzing their trend area. The trends maximum atmospheric tempe...

2015
Chen-Feng Yeh Jinge Wang Hsin-Fu Yeh Cheng-Haw Lee

Streamflow is an important factor in the study of water resource management, floods, and droughts. Dramatic climate change has created extreme rainfall distributions, making the study of streamflow trends and variability even more crucial. In this study, the long-term streamflow data and trends recorded at gauging stations in Northern Taiwan are analyzed using the Mann-Kendall test. The data us...

2013
H Y Wang Z Y Li Z H Gao J J Wu C L Li

Land condition assessment is a basic prerequisite for finding the degradation of a territory, which might lead to desertification under climatic and human pressures. The temporal change in vegetation productivity is a key indicator of land degradation. In this paper, taking the Otindag Sandy Land as a case, the mean normalized difference vegetation index (NDVI_a), net primary production (NPP) a...

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