نتایج جستجو برای: since 1980

تعداد نتایج: 529122  

Journal: :npj clean water 2023

Abstract Human activities and climate change threaten water quality in China’s rivers. We simulated the monthly concentrations of riverine total nitrogen (TN), ammonia-nitrogen (NH 3 -N), phosphorus (TP), chemical oxygen demand (COD Mn ) 613 sub-watersheds nation’s 10 major river basins during 1980–2050 period based on a 16-year (2003–2018) monitoring dataset using stacking machine-learning mod...

Journal: :International journal of social science and human research 2022

Since the attainment of political independence in 1980, Zimbabwe has made tremendous progress instituting local government reforms such as institutional consolidations, and realignment legal policy frameworks. The Local Government Associations are one institution that emerged voice articulating interests authorities through lobbying, representation, advocacy. However, since their endeavors prom...

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