Бидний тухай
Багш ажилтан
Перманганатаар исэлдүүлсэн органик нүүрстөрөгчийг (POXC) хөрсний бусад хөдөлгөөнт фракцтай харилцан хамааралтай, нарийвчлал сайтай, практик ашиглаж болохуйц учир хөдөлгөөнт нүүрстөрөгчийг тодорхойлох стандарт арга болгон ашигладаг. Энэхүү судалгааны ажлын зорилго нь хөрсний хөдөлгөөнт нүүрстөрөгчийг газар ашиглалтын өөр хэлбэрүүдэд тодорхойлоход оршино. Судалгааны зорилгын хүрээнд нүүрстөрөгчийн менежментийн индекс (CMI) бодох зорилт тавьсан. CMI нь тухайн газар нутгийн хөрсний нүүрстөрөгчийн төлөв байдлыг үнэлдэг тоон үзүүлэлт бөгөөд PОXC шинжилгээний дүнгээс бодож гаргадаг. Судалгааны талбайгаар Увс аймгийн бөхмөрөн сумыг сонгон авсан. Хөрсний дээжийг голын татам, бэлчээр, ойгоос 0-20, 20-40 см гүнээс авч Газарзүй, геоэкологийн хүрээлэнгийн хөрсний лабораторид хөрсний физик, химийн шинж чанарыг стандарт аргуудаар, хөдөлгөөнт нүүрстөрөгчийг олон улсын аргаар тодорхойлсон. Хөрсний органик нүүрстөрөгч нь (SOC) нь нийт хөрсөнд 9.4-73.2 г/кг хооронд агуулагдаж, ойн хөрсөнд хамгийн их, бэлчээрийн хөрсөнд хамгийн бага байна. Бидний судалгаагаар POXC нь хөрсний SOC хэмжээтэй хүчтэй хамааралтай (R2=0.62) байсан.
This study investigates the glacial lake outburst flood (GLOF) hazards in the Tsambagarav mountain range in Western Mongolia, focusing on the Khukhnuruu Valley and its interconnected proglacial lakes. Over the last 30 years, significant glacier retreats, driven by rising temperatures and changing precipitation patterns, have led to the formation and expansion of several proglacial lakes. Fieldwork combined with satellite data and meteorological analysis was used to assess the dynamics of glacier and lake area changes, with particular focus on the flood events of July 2021. The research reveals a substantial reduction in glacier area, particularly in the Khukhnuruu E complex, where glacier area decreased by 19.3%. The study highlights the influence of increasing temperatures and summer precipitation, which have accelerated ice melt, contributing to the expansion and eventual breaching of lakes. Additionally, lake area changes were influenced by the steepness of the terrain, with steeper slopes exacerbating peak discharge during floods. Of the studied seven lakes (Lake 1 to Lake 7), Lake 1 experienced the most dramatic reduction, with a decrease in area by 73.51% and volume by 84.84%, followed by Lake 7. This study underscores the region’s vulnerability to climate-induced hazards and stresses the need for a comprehensive early warning system and disaster preparedness measures to mitigate future risks.
This study investigates the glacial lake outburst flood (GLOF) hazards in the Tsambagarav mountain range in Western Mongolia, focusing on the Khukhnuruu Valley and its interconnected proglacial lakes. Over the last 30 years, significant glacier retreats, driven by rising temperatures and changing precipitation patterns, have led to the formation and expansion of several proglacial lakes. Fieldwork combined with satellite data and meteorological analysis was used to assess the dynamics of glacier and lake area changes, with particular focus on the flood events of July 2021. The research reveals a substantial reduction in glacier area, particularly in the Khukhnuruu E complex, where glacier area decreased by 19.3%. The study highlights the influence of increasing temperatures and summer precipitation, which have accelerated ice melt, contributing to the expansion and eventual breaching of lakes. Additionally, lake area changes were influenced by the steepness of the terrain, with steeper slopes exacerbating peak discharge during floods. Of the studied seven lakes (Lake 1 to Lake 7), Lake 1 experienced the most dramatic reduction, with a decrease in area by 73.51% and volume by 84.84%, followed by Lake 7. This study underscores the region’s vulnerability to climate-induced hazards and stresses the need for a comprehensive early warning system and disaster preparedness measures to mitigate future risks
The present paper aims to determine the basic soil properties of forest soil in the Undurkhangai soum of Uvs province. The 22 soil samples were taken from the forest soil at different altitudes of 1625, 1918, and 2139 meters. The collected soil samples were subjected to analyses for physicochemical properties and geochemical elements. In our study site soil reactions (pH) vary from 6.44-8.44 and showed slightly acidic to the alkaline condition and soil texture is loam with 40.9-68.7 % sand, 9.6-21.8 % clay, and 20.9-37.3 % silt, EC, available phosphorous, and available potassium ranged from 0.026-0.107 dS cm-1, 0.85-2.42 mg 100-1, 6.1-30.1 mg 100-1 respectively. There is not much difference in the amount of sand, silt, clay, and electrical conductivity depending on the height. According to the results of the study, the amount of soil carbonate and mobile potassium increased depending on the altitude, while the amount of humus and mobile phosphorus decreased. The correlation analysis among the different soil parameters showed soil organic matter was positively correlated with soil pH and available potassium. The heavy metal content of the soil is relatively low and does not contain any type of technogenic pollution, within permissible levels of Mongolian standards. This baseline information on soil parameters in different altitudes may help in forest study
Мянган Угалзатын нуруунаас Алтайн цаад говь болох Зүүн гарын говийн хөрсний хэв шинж, тэдгээрийн өнөөгийн төлөв байдал
By involving Specially protected areas, their environmental zones, and ecologically linked areas which were selected to determine the main criteria for evaluating the results of sustainable pasture management, we conducted a research work of collecting the basic information or database for sustainable pasture management in 4 provinces’ 10 soums. This article presents the typology of the grasslands Khar-us Nuur National park in Buyant soum of Khovd province. We followed the methodology specified in this order to calculate the carrying capacity of each type of pasture. The grazing capacity of each soum was calculated based on our field research materials according to the natural zoning and the results of the 2022 photo-monitoring report of soum. 100276.2 hectares or 53.46% of the territory of Buyant soum Khovd province is desert steppe, 50327.72 hectares or 26.83% is desert-like steppe, 36958.81 hectares or 19.70% belongs to dry steppe zone, it has 187562.7 hectares of pasture land, 53421 or 109325 thousand head of sheep, vegetation cover is 42.74%.
By involving Specially protected areas, their environmental zones, and ecologically linked areas which were selected to determine the main criteria for evaluating the results of sustainable pasture management, we conducted a research work of collecting the basic information or database for sustainable pasture management in 4 provinces’ 10 soums. This article presents the typology of the grasslands Khar-us Nuur National park in Buyant soum of Khovd province. We followed the methodology specified in this order to calculate the carrying capacity of each type of pasture. The grazing capacity of each soum was calculated based on our field research materials according to the natural zoning and the results of the 2022 photo-monitoring report of soum. 100276.2 hectares or 53.46% of the territory of Buyant soum Khovd province is desert steppe, 50327.72 hectares or 26.83% is desert-like steppe, 36958.81 hectares or 19.70% belongs to dry steppe zone, it has 187562.7 hectares of pasture land, 53421 or 109325 thousand head of sheep, vegetation cover is 42.74%.
Бэлчээрийн даац, малын тоо, төрлөөр, аймгуудын хадлангийн ургацын хэмжээ (ц/га), өвөлжөө, хаваржаа, зуслан, намаржааны байршил, нүүдэл, Ус цаг уур орчны шинжилгээний газрын бэлчээрийн мониторингийн 63 цэгийн тоо, хамрах хадлан, судалгааны багийн 480 цэгийн фотомониторингийн цэгийн бичиглэл түүнд тулгуурласан бэлчээрийн төлөв байдал, доройтлын зэрэг, даацын тоон мэдээлэл гаргав.
ХАА-н газрын хөрсний чанарын үнэлгээнд Storie Index Rating (SIR) аргыг ашигласан тухай
Говийн их дархан цаазат газрын Б хэсгийн хөрсөн бүрхэвч, хөрсний шинж чанарын талаарх судалгааны ажил
West Mongolia Buyant river delta area soil properties change study was done in 2015, comparing previous research data of Russian investigation of 1930. Depending on several significant reasons such as low precipitation, seasonal temperature difference, strong wind and fewer days of plant growing require great effort for the for soil cultivation and livestock husbandry. The fertility of the soil in the river valley was still economically beneficial for the Western region. A total of 50 samples were collected from 14 sites in delta of Buyant river. The collected soil samples were subjected to analyses for physical-chemical properties such as soil texture, pH and EC, soil organic matter, available phosphorus and available potassium. Laboratory analysis performed in Mongolia`s authorized laboratories in accordance with the standard methods. Content of organic matter in soil decreased by 51% in the last 85 years, salinization increased by 11%, and silt and clay contents are decreased while sand content is increased about mechanical composition. As a result of global warmth, dryness, and land use, soil properties changed drastically.
