การทดลองเเบบสุ่ม

การทดลองเเบบสุ่ม

ผลลัพธ์ (อังกฤษ) 1:

randomized experiment

ผลลัพธ์ (อังกฤษ) 2:

Randomized experiment

ผลลัพธ์ (อังกฤษ) 3:

In the field, much of the data on suspended sediment concentrations in the nearshore and surfzone has come from the deployment of electromagnetic current meters co-located with opticalbackscaterrance probes (OBS) (Downing et al.,1981; Beach and Sternberg, 1988). Data fromthe onoffshore component of a current meterand OBS deployed at Linden Beach, Nova Scotiaover an intertidal bar (Dawson et al., 2002) provide an example of suspension under shoalingwaves near the break point (Figure 7.7a). Thesmall-scale fluctuations in concentration reflectthe passage of individual waves over a rippled bed. Major episodes of suspension are producedby groups of larger waves which 'pump' sediment up into the water column over severalwave periods. Similar episodes (Figure 7.7b),can be seen for shoaling waves on a non-barredbeach (Osborne and Greenwood, 1992). Largersuspension events also reflect the nature of thebed with higher concentration associated withflows over dunes or lunate megaripples (Hay andBowen, 1994; Green and Black, 1999).