Impacts of irrigation efficiency on agricultural water-land nexus system management under multiple uncertainties—A case study in Amu Darya River basin, Central Asia

Sun, Jianyu; Li, Y.P.; Suo, C.; Liu, Y.R.

doi:10.1016/j.agwat.2019.01.025

Cited by 64 publications

(29 citation statements)

References 37 publications

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“…At present, agricultural water in Central Asia accounts for more than 80% of total water use [16]. The key to reducing water consumption via agriculture in Central Asia is to improve the efficiency of agricultural water use [17]. It is important to understand the temporal and spatial distribution characteristics of agricultural water use efficiency in Central Asia during the past half century.…”

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confidence: 99%

Temporal and Spatial Changes in Crop Water Use Efficiency in Central Asia from 1960 to 2016

2020

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Water resources among five Central Asian countries are distributed unevenly. Since the collapse of the Soviet Union, the conflict between water and land use has become increasingly serious. Due to limited data, the temporal and spatial characteristics and trends of crop water use efficiency in Central Asia over the past 60 years remain unclear. This paper combines state-level agricultural statistics data and cultivated land data (1975, 2005 and 2015) from remote sensing imagery and calculates crop water use efficiency based on the FAO crop coefficient method. The results are as follows: (1) the development of crop cultivation in Central Asia is divided into an expansion period (1960–1990), a reduction period (1990–2000), and a recovery period (2000–2016); (2) the grain yield in Central Asia increased from 0.9 to 1.9 t/ha during 1960–2016, with Uzbekistan having the highest, reaching 4.2 t/ha in 2016. Cotton yield increased during 1960–1990 and decreased from 1990 to 2016. (3) The grain water use efficiency in Central Asia increased from 0.22 kg/m3 to 0.39 kg/m3 during 1960–2016. The cotton water use efficiency increased from 0.23 kg/m3 to 0.30 kg/m3 during 1960–1990, has decreased since 1990, and is currently close to the 1960s level.

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confidence: 99%

Temporal and Spatial Changes in Crop Water Use Efficiency in Central Asia from 1960 to 2016

2020

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“…The Amu Darya river is the lengthiest transboundary river shared by five counties of Central Asia, including Afghanistan, Tajikistan, Kyrgyzstan, Turkmenistan and Uzbekistan (Jalilov et al, 2016;Schlüter et al, 2005), as shown in Figure 1. Rising from headwaters in the glacier and ice-packs in the mountains of Tajikistan, Kyrgyzstan and the north of Hindu Kush, it passes through Karakum and Kyzylkum deserts and drains into the Aral Sea (Kumar et al, 2019;Nezlin et al, 2004;Sun et al, 2019). The basin has a typical continental climate characterized by cold winter, hot summer, low precipitation, and relative humidity (Jalilov et al, 2013).…”

Section: Amu Darya River Basinmentioning

confidence: 99%

Selection of the Gridded Temperature Dataset for Assessment of Thermal Bioclimatic Environment Changes in Amu Darya River Basin

Salehie

Ismail

Shahid

et al. 2021

Preprint

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Assessment of the thermal bioclimatic environmental changes is important to understand ongoing climate change implications on agriculture, ecology, and human health. This is particularly important for the climatologically diverse transboundary Amy Darya River basin, a major source of water and livelihood for millions in Central Asia. However, the absence of longer period observed temperature data is a major obstacle for such analysis. This study employed a novel approach by integrating compromise programming (CP) and multicriteria group decision–making methods (MCGDM) to evaluate the efficiency of four global gridded temperature datasets based on observation data at 44 stations. The most reliable gridded data was used to assess the spatial distribution of global warming-induced unidirectional trends in thermal bioclimatic indicators (TBI) using a modified Mann-Kendall (MMK) test. Ranking of the products revealed Climate Prediction Center (CPC) temperature as most efficient in reconstruction observed temperature, followed by TerraClimate and Climate Research Unit (CRU). Assessment of TBI trends using CPC data revealed an increase in the minimum temperature in the coldest month over the whole basin at a rate of 0.03 to 0.08\(℃\) per decade, except in the east. Besides, an increase in diurnal temperature range and isothermally increased in the east up to 0.2\(℃\) and 0.6% per decade, respectively. The results revealed negative implications of thermal bioclimatic change on water, ecology, and public health in the eastern mountainous region and positive impacts on vegetation in the west and northwest.

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“…Water is the most critical factor affecting food production except soil [41,42]. A reasonable irrigation model not only improves irrigation efficiency, but also maintains water and soil balance in farmland [43]. Accessibility is considered to be one of the most important factors affecting land use [44].…”

Section: Construction Of Cultivated Land Evaluation Systemmentioning

confidence: 99%

Comprehensive Evaluation of Cultivated Land Quality at County Scale: A Case Study of Shengzhou, Zhejiang Province, China

Tan

Chen

Lian

et al. 2020

IJERPH

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The existing evaluation system of cultivated land quality mainly considers the natural quality and utilisation conditions, but without sufficient emphasis on ecological environment, which can’t meet the requirements of the trinity pattern protection policy. This study, using GIS spatial analysis and multifactor comprehensive evaluation method, constructed a comprehensive evaluation index system, and applied it in Shengzhou. The results show that: (1) under the comprehensive evaluation system, the quality of cultivated land was classified into five levels and revealed normal distribution with the third level cultivated land area as the peak, successive reduction to the two poles, and the overall quality was good relatively; (2) A close relationship was observed between the quality grade of cultivated land and the landform, the valley plain with highest cultivated land quality was the main grain-producing areas. However, the cultivated land in mountainous areas was poor relatively, and vulnerable to geological disasters; (3) The quality grade of cultivated land was related to economical activities directly. The high-quality cultivated land resources made these towns the main grain-producing areas with many agricultural industries distribution. This study provided a new assessment approach that can support cultivated land grading, quality improvement, and sustainable usage, as well as providing a reference for related research and application.

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Impacts of irrigation efficiency on agricultural water-land nexus system management under multiple uncertainties—A case study in Amu Darya River basin, Central Asia

Cited by 64 publications

References 37 publications

Temporal and Spatial Changes in Crop Water Use Efficiency in Central Asia from 1960 to 2016

Temporal and Spatial Changes in Crop Water Use Efficiency in Central Asia from 1960 to 2016

Selection of the Gridded Temperature Dataset for Assessment of Thermal Bioclimatic Environment Changes in Amu Darya River Basin

Comprehensive Evaluation of Cultivated Land Quality at County Scale: A Case Study of Shengzhou, Zhejiang Province, China

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