Figure 2.Locations of field samples investigated on 10-19 June 2007; there is aquatic vegetation in the black circle samples and there isn’t in the cross samples.The remote sensing reflectance and the backscattering coefficient, respectively, were measured in situ with a dual channel spectrometer FieldSpec 931 (ASD Ltd.) and a HydroScat-6 Spectral Backscattering Sensor (HS-6, HOBI Lab Inc.) mounted at six wavelengths (centered at 442, 488, 532, 589, 676 and 852 nm, respectively). The instruments, methods of measurement and data processing are the same as in Ma et al. [22, 23]. Water samples were collected from the surface to about 30 cm below in the vertical direction with a standard 21 polyethylene water-fetching instrument immediately after measuring the spectra.
They were then held in a freezer half filled with ice bags for preservation for approximately 4 h every afternoon, a
In the Mediterranean Basin fire plays a major role in many ecosystem processes. Recent statistics indicate that over 2,000 forest fires occur in Turkey every year, with an annual area burned ranging from 10 000 to 14 000 GSK-3 hectares [1]. To mitigate fire problem and minimize the threat of loss from wildfires, it is of crucial importance that forest managers conduct spatio-temporal analyses of forest fire danger and risk [2, 3].
Meanwhile, decision makers must also take into account the fire risk and danger potential that can lead to large scale severe forest fires as a result of forest growth [4, 5, 6], climatic change, land-cover (use) change [7, 8] and long-term fire suppression [9].
Fire risk and danger Batimastat potential have generally been associated with stand fuel characteristics, topographical features and land use. These include fuel types, canopy closure, fuel characteristics over the stages of stand development, horizontal and vertical fuel (biomass) continuity, terrain structure and underlying landform, and the distribution of settlement and agricultural areas across the forest [10, 11, 12]. The spatio-temporal patterns of these characteristics are fundamental to fire risk and danger potential assessment [12-14]. Thus, it is extremely important to develop methods that can help managers accurately and timely assess fire danger potential [15] and predict the probability of fire risk on a spatio-temporal scale [16]. Conventional field measurements can be useful in this regard, and is still necessary for ground validation and local-scale applications, but these are extremely labour intensive, costly and difficult to extrapolate accurately over large areas.