Estimation of Risk Thresholds for a Landslide in the Three Gorges Reservoir Based on a KDE-Copula-VaR Approach

Figure 7

Joint probability density functions (PDFs) between rainfall intensity, reservoir fluctuation, and landslide velocity constructed with the Frank copula. (a, c) Joint PDF between rainfall intensity and reservoir fluctuation. (b, e) Joint PDF between rainfall intensity and landslide velocity. (d, f) Joint PDF between reservoir fluctuation and landslide velocity.