Digital control of the application efficiency of agricultural land and the involvement of retired territories into circulation

The economic instability of recent decades has various social consequences. One of which is the emergence of abandoned agricultural areas. Analytical studies have shown that geolocation, aimed at creating a digital image of agricultural areas, reveals exclusion zones. The government has set the task of developing programs to involve the agricultural turnover of unused land. It is proposed to carry out a system-architectural design of the target zoning of territories. The selection of the basic model within the architecture of the Database of agricultural lands in circulation is supplemented by a block of a digital image for recognizing resource opportunities. The problem of developing a formalized set of typed commands that structure knowledge about the state of territories and their functionality for expert programming systems is solved. The database is formed from declarative (factual), procedural, and control knowledge. To form the database, the state of unused agricultural land in the country was shown. A forecast was given by the Ministry of Agriculture of Russia for the involvement of fallow lands in the turnover by the end of 2030. The concept of the efficiency of involving unused agricultural land into circulation was presented. A mathematical description of the risks and a graphical presentation of ways to achieve the efficiency of returning unused land by a set of indicators of risk restrictions were given. The key advantage of the developed concept is the creation of a modular-type production infrastructure, which is modernized and filled according to the current needs of economic activity, which is flexible to changes in internal factors and does not require external resources.

Dynamic response of the vegetation carbon storage in the sanjiang plain to changes in land use/cover and climate

Large-scale human activities especially the destruction of forest land, grassland, and unused land result in a large amount of carbon release into the atmosphere and cause drastic changes in land use/cover in the Sanjiang Plain. As a climate change-sensitive and ecologically vulnerable area, the Sanjiang Plain ecosystem’s carbon cycle is affected by significant climate change. Therefore, it is important that studying the impact of the changes in land use/cover and climate on vegetation carbon storage in the Sanjiang Plain. Remote sensing, temperature, and precipitation data in four periods from 2001 to 2015 are used as bases in conducting an analysis of land use/cove types and spatio-temporal variation of vegetation carbon density and carbon storage in growing season using model and related analysis methods. Moreover, the impact of land use/cover change and climate change on vegetation carbon density and carbon storage is discussed. The findings are as follows. (1) Cultivated land in the Sanjiang Plain increased, while forest land, grassland and unused land generally decreased. (2) Vegetation carbon density increased, in which the average carbon density of cultivated land, grassland, and unused land varied insignificantly, while that of forest land increased continuously from 4.18 kg C/m2 in 2001 to 7.65 kg C/m2 in 2015. Vegetation carbon storage increased from 159.18 Tg C in 2001 to 256.83 Tg C in 2015, of which vegetation carbon storage of forest land contributed 94% and 97%, respectively. (3) Conversion of land use/cover types resulted in a 22.76-TgC loss of vegetation carbon storage. Although the forest land area decreased by 3389.5 km2, vegetation carbon storage in the research area increased by 97.65 Tg C owing to the increase of forest carbon density. (4) Pixel-by-pixel analysis showed that vegetation carbon storage in the majority of the areas of the Sanjiang Plain are negatively correlated with temperature and positively correlated with precipitation. The results showed that changes of land use/cover types and vegetation carbon density directly lead to a change in vegetation carbon storage, with the change of forest vegetation carbon density being the main driver affecting vegetation carbon storage variation. The increase of temperature mainly suppresses the vegetation carbon density, and the increase of precipitation mainly promotes it.

Buddhist Monasteries Facilitated Landscape Conservation on the Qinghai-Tibetan Plateau

Context The Sanjiangyuan region of the Qinghai-Tibetan Plateau (also known as the “Three Rivers’ Headwaters”) is the origin of Yellow, Yangtze, and Mekong Rivers and therefore the key water source for hundreds of millions of downstream residents. Protecting this region’s ecosystems is a key priority for sustainable development in China and Asia. An important social dimension of Sanjiangyuan is the long-established and widespread presence of Tibetan Buddhism, particularly as manifested in the large number of monasteries throughout the region. However, the influence of cultural, and specifically religious, factors on environmental change remains largely understudied here. Objective We focus on two types of spatial associations - point-point and point-area features - to quantitatively investigate the effects of Buddhist monasteries on LUCC in surrounding landscapes. Methods We conduct a spatially-explicit analysis of Sanjiangyuan for two periods, 1990-2000 and 2010-2015, to identify and quantify the influence of the presence and spatial distributions of Buddhist monasteries on LUCC (or lack therefore, implying landscape conservation) in comparison to village communities that lack monasteries. Results We found a “clustering effect” in which the spatial aggregation of monasteries being highly correlated with the preservation of natural ecosystems, specifically of grasslands and forests. Within monastery buffer zones with radii between 1 and 10 km, 7.13-9.30% more grassland area and 7.14-7.47% more forest area remained around monasteries compared to villages. This contrast decreased with increasing distance to the monastery/village. Overall built-up areas were also much smaller around monasteries than around villages, while unused land was more commonly transformed to forests and grasslands around monasteries.Conclusions These findings strongly support the idea that Buddhist culture, as manifested through its physical institutions and communities, are instrumental in achieving desired landscape conservation outcomes.

Land use and cover change in Northeast China and its impacts on the Xing'an permafrost in 1980-2020

Vegetation plays important roles in the development and protection of permafrost; it is one of the main local and ecosystemic factors that affect the thermal stability of the underlying soil strata. Multi-period land use and cover change (LUCC) data and long-time series of air temperature were chosed. Based on these data, spatiotemporal changes in mean annual air temperature (MAAT) were simulated by the Ordinary Least Squares (OLS) method and Ordinary Kriging (OK) model in the 1980s-2010s in Northeast China. The influences of LUCC on MAAT in Northeast China and distribution of the Xing’an permafrost were analyzed and the results showed that: (1) Decadal average of MAAT increased from 4.60oC (1980s) to 5.38oC (2010s) in Northeast China, with an upward trend of 0.25oC/10a. (2) During the 1980s to 2010s, the total permafrost area showed a decreasing trend (3.668×104 km2/10a). (3) In permafrost regions, LUCC had undergone significant structural changes: forested land showed a consistent decreasing trend and other lands showed an overall increasing trend. (4) The effects of different LUCC on MAAT in the permafrost region varied substantially. The mean MAAT of forested land was the lowest (2.33oC), and; that of unused land, the highest (0.37oC). The change rate in MAAT of cultivated land was the highest (0.37oC/10a), and; that of unused land, the lowest (0.28oC/10a). (5) The degradation rates of permafrost in forested land (1.822×104 km2/10a) and grassland (1.397×104 km2/10a) were the largest from 1980s to 2010s.

Singapore vs. the ‘Singapore of Africa’—Different Approaches to Managing Urban Agriculture

Through structured comparison, this article seeks to present the different approaches to urban agriculture in the cities of Singapore and Kigali. The former is seen as a model ‘smart city’ worth following worldwide, while the latter is frequently referred to as the ‘Singapore of Africa’. The research conducted was divided into two stages. The first one was desk-based and included the analysis of satellite and aerial images along with the analysis of legal documents regarding land ownership and urban agriculture management. The second one was based on field work carried out in 2019 in both cities and comprised the mapping of areas encompassed by urban agriculture, the collection of photographic documentation, field observations, as well as semi-structured interviews. The research was summarized in line with a comparative analysis of institutional and legal framework of urban agriculture and policy towards its development; spatial features of urban agriculture, including distribution, location, and area; as well as inherent features of urban agriculture, including systems of production, main crops, production methods, and functions. The process makes it clear that despite the fact that urban agriculture is considered in planning documents of both cities, the scale of the activity and the approach towards it differ markedly. In Singapore, the authorities support mainly the high-technology and land-efficient solutions, with other, low-profit forms of agricultural activity being pushed out from the urban space. In turn, in Kigali, where the scale of agricultural activity is incomparably greater, the inhabitants enjoy a certain freedom to make use of unused land in cultivation, which increases their food security and enhances their ability to cope with external stresses.

ANALISIS PENAMPANG FONDASI TIANG PANCANG PADA TEPI TANAH REKLAMASI

Indonesia is a country with 4th largest population in the world. With that huge amount of population, the land capacity on the mainland is becoming more limited day by day, on the other hand, the unused land on the coast is still not utilized properly. The solution of that problem is by doing reclamation on the coast. Reclamation is an activity to increase the usability of land resources in the eye of the environmental side, social and economy by doing dropping, land drying, or drainage. Usually, the material for dropping reclamation is using cohesive soil. In this research, we will talk about driven pile foundation on reclamation land. Bearing capacity and concrete volume that would be used from every driven pile shape would be compared by paying attention from scouring effect that can decrease the bearing capacity of the pile. In this study, we will show the best driven pile shape that can be used on reclamation land.Indonesia merupakan negara dengan jumlah penduduk terbanyak ke empat di dunia. Dengan banyaknya penduduk di Indonesia mengakibatkan lahan di daratan semakin terbatas, sedangkan lahan di sekitar pinggir pantai masih banyak yang belum dimanfaatkan dengan baik. Solusi dari permasalahan keterbatasan lahan di daratan tersebut adalah dengan melakukan reklamasi pada daerah pinggir pantai. Reklamasi adalah sebuah kegiatan yang dilakukan dalam rangka meningkatkan manfaat sumber daya lahan yang ditinjau dari sudut lingkungan, sosial dan ekonomi, dengan melalui pengurugan, pengeringan lahan atau drainase. Pada umumnya material untuk pengurugan reklamasi adalah menggunakan tanah kohesif. Pada penulisan ini akan dibahas penggunaan fondasi tiang pancang pada tanah reklamasi. Daya dukung dan volume beton yang digunakan dari setiap bentuk tiang pancang tersebut akan dibandingkan dengan memperhatikan efek scouring yang dapat mengurangi daya dukung pada tiang. Sehingga hasil studi ini akan menunjukan bentuk tiang pancang manakah yang paling cocok digunakan pada tanah reklamasi.

Linking Morphological Spatial Pattern Analysis and Circuit Theory to Identify Ecological Security Pattern in the Loess Plateau: Taking Shuozhou City as an Example

Located in an ecologically fragile area in China’s eastern part of the Loess Plateau, Shuozhou City has faced environmental challenges imposed by frequent urban expansion and mining activities in recent years. As ecological security patterns (ESP) identification and optimization are significant to regional biodiversity and ecosystem services, this study combined morphological spatial pattern analysis (MSPA) and circuit theory to construct and optimize regional ESP. Results show the number and area of ecological sources in the study area decreased from 21 to 20 between 2010 and 2017. The total area of ecological sources fell from 1923.35 km2 to 1869.37 km2, with their proportion in the study area dropped from 18.14% to 17.64%. From 2010 to 2017, the number of obstacles increases from 63 to 80, mainly consisting of farmland, unused land, transportation land, and construction land. The area of obstacles reached 10.17 km2 in 2017. A framework of “one protection area, two regulation areas, and three restoration areas” is proposed to optimize the ESP of the study zone. This study explored a combination of ESP analysis tools and focused on improving regional ecosystem service and biodiversity. It will support local urban planning and provide a reference for similar studies in resource-based cities.

Utilization of Renewable Energy: A Study on the Utilization of Solar Energy for Power Plants at the Campus of Universitas Samudra, Indonesia

The availability of solar energy is higher than global energy consumption, affordable by many users, simple to use, and relatively more environmentally friendly. Complexes of higher education institutions in Indonesia, in general, consist of many buildings with large roofs and stretches of unused land, which are suitable for solar power installations. This study analyzes the feasibility of constructing a solar power plant at an educational institution facility, with a specific case study on the Universitas Samudra campus. The analysis results have shown that for the supply of electricity with a total power of 10 MW, PV panels are superior to parabolic collectors. The cost of producing electricity using PV panels is 6.60 ¢/kWh, while the parabolic collector costs 26.42 ¢/kWh. And the total area required for the installation of PV.

The assessment of the impact of short-term land use/cover changes on water resources in the Yanghe reservoir basin, China

Land Use/Land Cover (LULC) is the main factor that affects the hydrological process of catchment. A better understanding of its influence is of great significance to future land use planning and water resources management. Since 2011, the local government has implemented the land remediation plan, and the LULC has undergone major changes in the Yanghe Reservoir Basin. This paper used The Soil and Water Assessment Tool (SWAT) model to study the Blue Water (BW) and Green Water (GW) resources in three typical years (wet year, dry year, and normal year) under the two LULC scenarios in 2010 and 2017 of the basin. The results showed that from 2010 to 2017, the area of cultivated land and residential construction land increased by 227.28% and 269.23%, respectively; the area of unused land, woodland, and grassland decreased by 98.84%, 35.90% and 39.52%, respectively. Compared with the results of the 2010 LULC scenario, the average BW of the three typical years under the 2017 LULC scenario decreased by 11.66%, 52.32%, and 21.95%, respectively, and the average GW flow increased by 6.72%, 2.90%, and 6.83%, respectively, and the average GW reserves decreased by 14.80%, 11.39%, and 7.67%, respectively. Therefore, this study believed that changes of LULC have led to a significant decrease in runoff and an increase in evapotranspiration in the basin.

Spatial-Temporal Change of Land Use and Its Impact on Water Quality of East-Liao River Basin from 2000 to 2020

Land use change is an important driving force factor affecting the river water environment and directly affecting water quality. To analyze the impact of land use change on water quality change, this study first analyzed the land use change index of the study area. Then, the study area was divided into three subzones based on surface runoff. The relationship between the characteristics of land use change and the water quality grade was obtained by grey correlation analysis. The results showed that the land use types changed significantly in the study area since 2000, and water body and forest land were the two land types with the most significant changes. The transfer rate is cultivated field > forest land > construction land > grassland > unused land > water body. The entropy value of land use information is represented as Area I > Area III > Area II. The shift range of gravity center is forest land > grassland > water body > unused land > construction land > cultivated field. There is a strong correlation between land use change index and water quality, which can be improved and managed by changing the land use type. It is necessary to establish ecological protection areas or functional areas in Area I, artificial lawns or plantations shall be built in the river around the water body to intercept pollutants from non-point source pollution in Area II, and scientific and rational farming in the lower reaches of rivers can reduce non-point source pollution caused by farming.