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Risk management of a development of systems and territories is one of the key problems of managerial decision-making. This is due to the impossibility of carrying out model experiments and the complexity of formalization of characteristics. The necessity of considering the peculiarities of the spatial distribution of subjects and objects of management allows to speak about relevance of geoinformation management. Compared with other classes of potentially hazardous systems, spatially distributed systems and areas characterized by a significant level of inertia that contributes to sustainability in development, but hinders the development management and allows the dynamics to determine the influence of threat factors. The effects of hazards on the territory are systemic. The article describes: - analysis of dynamics of control conditions for the development of spatially distributed objects and territories; - classification of risks for coastal management; - principles of risk management development of the coastal areas; - the system model (conceptual model) of risk management in its spatial aspect, as well as private models for risk management under the influence of natural factors.

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Emission spectra of exciton annihilation are measured in CdSe crystals from 2 to 77 O K . Especially the line-shape, due to exciton annihilation with simultaneous creation of one or two phonons is considered. This shape can adequately be described on the basis of energy and momentum conservation laws only if the momentum dependence of the exciton-phonon interaction probability is properly taken into account. As a result analytical expressions ESP exp ( -E / k T ) for the one-phonon line and Ell2 exp (-E/kT) for the two-phonon line, where E is the exciton kinetic energy, are obtained. An additional broadening of exciton emission lines, clearly observed a t lower temperatures, is assigned to the inherent width of exciton levels.