Nowadays we can clearly see the activeness of the methodological and technological aspects of the new geoinformation direction in the field of cartography. The development of modern mapping methods is closely related to the development of geoinformation systems and technologies. The importance of geoinformation cartography and geoinformation systems is significant in creating databases and digital maps based on GIS software instead of analog methods for creating maps. There are the most important tasks such as improvement of modern method in obtaining cartographic information, and development of ways to quickly transmit and distribute cartographic information about nature and society. The application of GIS technologies in the field of demographic cartography will lead to drastic changes in the scope of work, as well as improve product design and increase the accuracy as a result of the performed tasks. The study shows that there is a need to develop a new method for mapping a new generation based on GIS technology, reflecting demographic processes. This article will focus on creating a database for development of maps based on GIS technologies, rapid identification, monitoring spatial changes using data from aerospace and other sources, and development of demographic digital mapping methods based on GIS technologies. Mapping demographic processes based on GIS technologies aims at implementing a number of practical tasks and research related to population. Based on this, a systematic method has been developed to analyse the demographic situation in the southern region of the Republic of Uzbekistan, and a digital demographic map has been created by applying the developed method.

The article reveals the fundamentals of engineering and designing mobile weir with rectangular opening for farmlands, applicable for measuring discharge in interfarm and temporary canals. It includes the fundamentals of choosing most efficient structural solutions for the weir, choosing material for fabrication of its main elements, performing the static design for weir horizontal beams according to marginal states of providing reliability and stability of weir main elements. Results of calculations of diameter of steel bar for rectangular weir with B=25cm showed that the diameter needed is 6mm. The diameter is small enough for the weir to be called a thin plate weir. Thus, using 6mm bar is reasonable enough from the point of view of stability and the by the requirements for a thin plate weir.

The concentration of suspended solids is the main indicator of the flow transporting suspended sediments. Knowing its value, it becomes possible to predict channel processes on rivers, the timing of sedimentation tanks and reservoirs. Establishing patterns of the influence of structures on the redistribution of liquid and solid runoff is also a priority task. The main goal of this work is to establish the regularities of the distribution of the concentration of suspended matter in a stream constrained by a transverse spur. The problem is considered for the second time using materials from field studies conducted on spur No. 19 in 2020 on the left bank of the Amu Darya river. The methodology of field studies remained the same as for the first time on dam No. 30 in 2019. The positions of the sections and verticals during sampling to determine the concentration of suspended matter were assigned based on the hydraulic structure of the constrained flow. Considering the presence of homogeneous zones of a weakly perturbed core, intense turbulent mixing and reverse currents, as is customary in the theory of turbulent jets with an admixture propagating in a confined space. On verticals, samples were taken at two points 0.2H and 0.8H, and at shallow depths at a depth of 0.6H. Field observations established that in the zone of the slightly disturbed core of the distribution of the concentration of suspended matter along the depth, it has the shape of a “boot”; however, the length of the toe is much shorter than that of the dam 30 and is observed only in the sections P-P and O-O, and in the other sections there is a leveling in depth. On other sections, they are close to logarithmic. The maximum concentration of suspended matter was observed in the section of confinement O-O at point 0.8H 7.66 kg / m3, which in the section of confinement under the influence of a new spur occurs deep and lateral erosion of the channel. The distribution in plan in the zone of a weakly disturbed core is close to uniform. Here again, in the zone of intense turbulent mixing, it obeys the theoretical Schlichting-Abramovich dependence for the initial section. With the help of the results obtained, it is possible to predict the siltation of the inter-dam space and the boundaries of the new coastline in the future.

Different types of methods in science and technology, such as statistical, cartographic, and satellite materials are being used to describe events and objects. The application of modern GIS technologies in collection and processing of data on regions, demographic processes and events is highly demanding in demographic studies. The main feature of GIS software is to integrate and analyze geographic spatial data, and create map. In this research, it was found that classification and creation of demographic data in regions using GIS software helped to regulate the demographic processes in the regions.

This article considers the content of service maps and some methodological features of their creation, the experience gained in Uzbekistan in this field as one of the important areas of modern socio-economic cartography. At the same time, attention was paid to the role and place of modern geographic information systems in the creation of service maps, scientific and practical issues of their use. According to the cartographic criteria, thematic maps based on DemoGIS and geo-statistical analysis methods were developed and created in accordance with the research methodology. The results of the research on the use of GIS technology showed that a geographically innovative methodological approach solved theoretical and practical problems.