A fish‐based multi‐metric assessment index in the Karun River basin, Iran

The Water Framework Directive establishes that the river basin management plans must have a summary of the pressures and impacts of human activities, such as agriculture, on the chemical and quantitative status of groundwater bodies. In order to identify those areas where a potential impact from agricultural activities on groundwater bodies exists, but currently lacking groundwater monitoring data, a methodology was developed that combines the use of gross nitrogen balance values with the results of a specific vulnerability assessment index. A farm management efficiency parameter is added, to identify the factors that contribute to nitrogen use efficiency and to assess the near-future scenarios. This methodology allows the identification of significant pressures that may be responsible for a groundwater body failing good status where there is no representative monitoring network.

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BIOTIC ASSESSMENT INDEX BASED ON ANURAN SPECIES TO EVALUATE THE BIOTIC INTEGRITY OF THE FLOODED SAVANNAS ECOSYSTEM FROM PAUTO RIVER BASIN (CASANARE-COLOMBIA)

Revista Latinoamericana de Herpetología ◽

10.22201/fc.25942158e.2021.1.152 ◽

2021 ◽

Vol 4 (1) ◽

pp. 35

Author(s):

Teddy Angarita Sierra

Keyword(s):

River Basin ◽

Landscape Fragmentation ◽

Decision Makers ◽

Biotic Integrity ◽

Management Tool ◽

Assessment Index ◽

Anuran Species ◽

Landscape Mosaics

Currently, huge environmental impacts such as diversity loss, landscape fragmentation and pollution have been modifying the dynamics of the flooded savannas ecosystems from Pauto River basin in Colombia. Hereby, I have developed a practical management tool to support decision makers and stakeholders in assessing the state of biotic integrity within an ecosystem based on anuran species composition that inhabit this ecosystem. The IBIA shown be sensitive to native vegetation transformation which is correlated with anuran composition. Also, the index provided a clear indication regarding the biological integrity as well as environmental quality of the areas in which the IBIA was utilized. However, the IBIA requires medium and long term application and monitoring within different landscape mosaics present in the flooded savannas from the Orinoquia region for its calibration.

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Drought assessment in the Dongliao River basin: traditional approaches vs. generalized drought assessment index based on water resources systems

Natural Hazards and Earth System Science ◽

10.5194/nhess-15-1889-2015 ◽

2015 ◽

Vol 15 (8) ◽

pp. 1889-1906 ◽

Cited By ~ 3

Author(s):

B. S. Weng ◽

D. H. Yan ◽

H. Wang ◽

J. H. Liu ◽

Z. Y. Yang ◽

...

Keyword(s):

Water Resources ◽

River Basin ◽

Drought Severity ◽

Severe Drought ◽

Drought Duration ◽

Assessment Index ◽

Drought Assessment ◽

Water Resources Systems ◽

Traditional Approaches ◽

The Impact

Abstract. Drought is firstly a resource issue, and with its development it evolves into a disaster issue. Drought events usually occur in a determinate but a random manner. Drought has become one of the major factors to affect sustainable socioeconomic development. In this paper, we propose the generalized drought assessment index (GDAI) based on water resources systems for assessing drought events. The GDAI considers water supply and water demand using a distributed hydrological model. We demonstrate the use of the proposed index in the Dongliao River basin in northeastern China. The results simulated by the GDAI are compared to observed drought disaster records in the Dongliao River basin. In addition, the temporal distribution of drought events and the spatial distribution of drought frequency from the GDAI are compared with the traditional approaches in general (i.e., standard precipitation index, Palmer drought severity index and rate of water deficit index). Then, generalized drought times, generalized drought duration, and generalized drought severity were calculated by theory of runs. Application of said runs at various drought levels (i.e., mild drought, moderate drought, severe drought, and extreme drought) during the period 1960–2010 shows that the centers of gravity of them all distribute in the middle reaches of Dongliao River basin, and change with time. The proposed methodology may help water managers in water-stressed regions to quantify the impact of drought, and consequently, to make decisions for coping with drought.

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