GLORIA — GEOMAR Library Ocean Research Information Access

Unbekannt

Study on Calculation Method of Water Resources Supply and Demand Balance in Plain River Network Area (2018)

Xia Wu, Liu Lu Guang, Zhang Zu Lian, Guan Hong Lin, Dong Wei and Wang Jian

Institute of Physics (IOP)

In: IOP Conference Series: Earth and Environmental Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2018-06-03

Beschreibung: After the impoundment of the Three Gorges reservoir, the middle and lower reaches of Yangtze River will have a long distance erosion in a long time, and in the conditions of the same flow, the water level of the three outlets along Jingjiang river reach (Songzi outlet, Taiping outlet, Ouchi outlet) will drop, which leads to the flow diversion reduction of three outlets. Undoubtedly, all these will have an impact on irrigation and water supply of river networks on south bank of Jingjiang river reach. The calculation of water resources supply and demand balance is the foundation of analyzing the influence of the Three Gorges Project on the river networks on south bank of Jingjiang river reach, clearing the key link of water shortage and allocating water resources. The calculation of water resources supply and demand balance in this area, however, has unique complexity of plain river network, which is caused by multi-water sources and multi-water intakes. To handle this problem, th...

Print ISSN: 1755-1307

Digitale ISSN: 1755-1315

Thema: Geographie , Geologie und Paläontologie , Physik

Publiziert von Institute of Physics (IOP)

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

PAPER CURRENT

Volltext

Unbekannt

Improved Algorithm of SCS-CN Model Parameters in Typical Inland River Basin in Central Asia (2017)

Jin J Wang, Jian L Ding, Zhe Zhang and Wen Q Chen

Institute of Physics (IOP)

In: IOP Conference Series: Earth and Environmental Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2017-03-08

Beschreibung: Rainfall-runoff relationship is the most important factor for hydrological structures, social and economic development on the background of global warmer, especially in arid regions. The aim of this paper is find the suitable method to simulate the runoff in arid area. The Soil Conservation Service Curve Number (SCS-CN) is the most popular and widely applied model for direct runoff estimation. In this paper, we will focus on Wen-quan Basin in source regions of Boertala River. It is a typical valley of inland in Central Asia. First time to use the 16m resolution remote sensing image about high-definition earth observation satellite “Gaofen-1” to provide a high degree accuracy data for land use classification determine the curve number. Use surface temperature/vegetation index (T S /VI) construct 2D scatter plot combine with the soil moisture absorption balance principle calculate the moisture-holding capacity of soil. Using original and parameter algorithm improved SCS-C...

Print ISSN: 1755-1307

Digitale ISSN: 1755-1315

Thema: Geographie , Geologie und Paläontologie , Physik

Publiziert von Institute of Physics (IOP)

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

PAPER CURRENT

Volltext

Unbekannt

Impact Analysis and Protection Scheme of Subway Shield Tunneling under Existing Railways (2018)

Zheng Hua He, Guo Quan Wang, Jian Wei Chen, Xu Zhi Zhang and Huang Yong

Institute of Physics (IOP)

In: IOP Conference Series: Earth and Environmental Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2018-10-12

Beschreibung: The urban rail transit shield will have a bad influence on the railway’s safe operation when it tunnels under existing railways. Main measures to avoid risks include reasonable analysis of the influence of tunneling under existing railway subgrade, design of effective construction schemes and reinforcement of protection of existing railways. According to the case of engineering of Wuhan Metro Line 7 under the existing Wuhan-Guangzhou Passenger Railway, the influence of the metro tunneling project on the settlement of Wuhan-Guangzhou Passenger Railway subgrade is analyzed. In addition, precautions for the tunneling project and protection measures for the existing railways are proposed herein.

Print ISSN: 1755-1307

Digitale ISSN: 1755-1315

Thema: Geographie , Geologie und Paläontologie , Physik

Publiziert von Institute of Physics (IOP)

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

PAPER CURRENT

Volltext

Unbekannt

Global evidence on nitrogen saturation of terrestrial ecosystem net primary productivity (2016)

Dashuan Tian, Hong Wang, Jian Sun and Shuli Niu

Institute of Physics (IOP)

In: Environmental Research Letters

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2016-02-20

Beschreibung: The continually increasing nitrogen (N) deposition is expected to increase ecosystem aboveground net primary production (ANPP) until it exceeds plant N demand, causing a nonlinear response and N saturation for ANPP. However, the nonlinear response of ANPP to N addition gradient and the N saturation threshold have not been comprehensively quantified yet for terrestrial ecosystems. In this study, we compiled a global dataset of 44 experimental studies with at least three levels of N treatment. Nitrogen response efficiency (NRE, ANPP response per unit N addition) and the difference in NRE between N levels (ΔNRE) were quantified to test the nonlinearity in ANPP response. We found a universal response pattern of N saturation for ANPP with N addition gradient across all the studies and in different ecosystems. An averaged N saturation threshold for ANPP nonlinearity was found at the N addition rates of 5–6 g m −2 yr −1 . The extent to which ANPPapproaches N satura...

Print ISSN: 1748-9318

Digitale ISSN: 1748-9326

Thema: Biologie , Energietechnik

Publiziert von Institute of Physics (IOP)

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

PAPER CURRENT

Volltext

Unbekannt

Geospatial data infrastructure: The development of metadata for geo-information in China (2014)

Baiquan Xu, Shiqiang Yan, Qianju Wang, Jian Lian, Xiaoping Wu and Keyong Ding

Institute of Physics (IOP)

In: IOP Conference Series: Earth and Environmental Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2014-03-19

Beschreibung: Stores of geoscience records are in constant flux. These stores are continually added to by new information, ideas and data, which are frequently revised. The geoscience record is in restrained by human thought and technology for handling information. Conventional methods strive, with limited success, to maintain geoscience records which are readily susceptible and renewable. The information system must adapt to the diversity of ideas and data in geoscience and their changes through time. In China, more than 400,000 types of important geological data are collected and produced in geological work during the last two decades, including oil, natural gas and marine data, mine exploration, geophysical, geochemical, remote sensing and important local geological survey and research reports. Numerous geospatial databases are formed and stored in National Geological Archives (NGA) with available formats of MapGIS, ArcGIS, ArcINFO, Metalfile, Raster, SQL Server, Access and JPEG. But there...

Print ISSN: 1755-1307

Digitale ISSN: 1755-1315

Thema: Geographie , Geologie und Paläontologie , Physik

Publiziert von Institute of Physics (IOP)

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

PAPER CURRENT

Volltext

Treffer 1 - 5 | 5 Treffer