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Dongyang Ren
China Agricultural University
7Publications
4H-index
63Citations
Publications 8
Newest
#1Yeqiang Wen (THU: Tsinghua University)
#2Songhao Shang (THU: Tsinghua University)H-Index: 11
Last.Dongyang Ren (CAU: China Agricultural University)H-Index: 4
view all 5 authors...
Abstract The complex and dense irrigation and drainage networks and diverse irrigation scheduling result in uncertainties and complexities in the simulation of drainage water and salinity at different regional scales. We propose a semi-distributed model to simulate monthly drainage water and salinity, considering both the surface return flow and groundwater drainage to drainage ditches. The model uses sub-drainage command areas (SDCAs) controlled by main irrigation canals and drainage ditches as...
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#1Dongyang Ren (CAU: China Agricultural University)H-Index: 4
#2Boyu Wei (CAU: China Agricultural University)
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
view all 8 authors...
Abstract Soil salinization is one of the most common land degradation processes that impacts agricultural production, environmental health, and economic welfare. The first task in managing soil salinity is to understand its spatiotemporal characteristics, causal factors and influences, both over large regions and within individual fields. In this study, a typical irrigated agro-ecosystem located in the upper Yellow River basin, suffering from long-term soil salinization problems, was selected as...
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#1Lvyang Xiong (CAU: China Agricultural University)H-Index: 1
#2Xu Xu (CAU: China Agricultural University)H-Index: 12
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
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Abstract This article introduces the SWAT-AG (a modified SWAT for agro-hydrological modeling) as an enhanced hydrological model for simulating the hydrological processes in agricultural watershed with shallow water tables. The model is developed based on the framework of the SWAT with significant improvements on describing the interactions of the vadose zone water, groundwater, salt and plant growth. The main features of the SWAT-AG include that it can simulate the close interactions of soil wat...
1 CitationsSource
#1Dongyang Ren (CAU: China Agricultural University)H-Index: 4
#2Xu Xu (CAU: China Agricultural University)H-Index: 12
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
view all 7 authors...
Abstract Hydrological effects caused by fragmented land cover types in human-dominated agro-ecosystems are poorly understood. In this study, based on visual interpreted high-resolution land cover map, an agro-hydrological model (HYDRUS-dualKc) was used in a distributed manner to investigate the hydrological complexities caused by fragmented land cover types and shallow groundwater. An irrigation system located in the upper Yellow River basin was chosen as a case study area, where field observati...
3 CitationsSource
#1Dongyang RenH-Index: 4
#2Xu XuH-Index: 12
Last.Guanhua HuangH-Index: 26
view all 6 authors...
Clarifying the role of shallow groundwater systems in eco-hydrological processes is of great significance to agricultural production and ecological sustainability. In this paper, a lumped water balance model was proposed for the GSPAC (groundwater-soil-plant-atmosphere-continuum) system for different land use types under arid, shallow water table conditions. Model application was conducted in an irrigation district (Jiyuan) located in the upper Yellow River basin. A 13-year (2001–2013) water bal...
6 CitationsSource
#1Dongyang Ren (CAU: China Agricultural University)H-Index: 4
#2Xu Xu (CAU: China Agricultural University)H-Index: 12
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
view all 4 authors...
Due to water scarcity, water saving practices (WSPs) are being implemented in the irrigation districts of the upper Yellow River basin, causing a series of consequences, e.g. the reduction of field irrigation amount and groundwater depth (GWD) increase. The impacts of irrigation water reduction and GWD increase in canal systems with heterogeneous land covers is complex and remains unclear, thus the need to be elucidated to efficiently promote WSPs. Based on the two-year field observations in 201...
7 CitationsSource
#1Dongyang Ren (CAU: China Agricultural University)H-Index: 4
#2Xu Xu (CAU: China Agricultural University)H-Index: 12
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
view all 6 authors...
Abstract Relatively low-lying zones of natural vegetation within irrigated areas are not only carriers of biodiversity but also dry drainage areas of excess water and salts applied to nearby croplands. It is thus useful to have a correct understanding of the soil water-salt dynamics and plant water use for keeping the sustainability of those natural areas. The HYDRUS-dualKc model that couples the HYDRUS-1D model with the FAO-56 dualKc approach was extended to simulate the eco-hydrological proces...
7 CitationsSource
#1Dongyang Ren (CAU: China Agricultural University)H-Index: 4
#2Xu Xu (CAU: China Agricultural University)H-Index: 12
Last.Guanhua Huang (CAU: China Agricultural University)H-Index: 26
view all 4 authors...
Summary Water saving in irrigation is a key issue in the upper Yellow River basin. Excessive irrigation leads to water waste, water table rising and increased salinity. Land fragmentation associated with a large dispersion of crops adds to the agro-hydrological complexity of the irrigation system. The model HYDRUS-1D, coupled with the FAO-56 dual crop coefficient approach (dualKc), was applied to simulate the water and salt movement processes. Field experiments were conducted for maize, sunflowe...
39 CitationsSource
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