◎译 名 珍珠港/Tennessee ◎片 名 Pearl Harbor ◎年 代 2001 ◎产 地 美国 ◎类...
Figure 9. The characteristics of droughts caused by natural factors and actual occurrences in the PRB (a–c) and its sub-basins: NBPRB (d–f), HRB (g–i), YRB (j–l), WRB (m–o), NRB (p–r), ERB (s–u); PRD (v–x). In the PRB (Figure 9b), the peak magnitude of...
3.1. Water Quality Assessment The overall water quality of different cities and the whole PRD area is measured using WPI, which is defined as: W P It = 1 n n ∑ i=1 Ci(t) Si (1) where WPIt is the WPI of a region in year t, n is the number of water quality parameters, Ci...