Results 11 to 20 of about 406 (70)

Rural household's willingness to pay for irrigation water use: An application of contingent valuation method, in the case of North Shewa zone, Ethiopia

open access: yesWorld Water Policy, Volume 9, Issue 4, Page 943-959, November 2023., 2023
Abstract This study aimed to evaluate household's willingness to pay (WTOP) for irrigation water use (IWU) per timad (0.25 ha) of the irrigable land per year and to analyze determinants of WTOP for IWU at individual households based on the contingent valuation method (CVM).
Biruk Kemaw Shenkute   +3 more
wiley   +1 more source

Transdisciplinary approach for planning the expansion of irrigation infrastructure at a regional scale

open access: yesWorld Water Policy, Volume 9, Issue 3, Page 371-387, August 2023., 2023
Abstract The focus on irrigation infrastructure development in countries like India, including a significant allocation of the government's budget, highlights the importance of achieving a high benefit–cost ratio for these projects. However, past reviews have revealed instances where irrigation projects yielded low benefits.
Annie Maria Issac   +7 more
wiley   +1 more source

Geospatial data and web based tools for managing irrigation infrastructure expansion projects

open access: yesWorld Water Policy, Volume 9, Issue 3, Page 388-403, August 2023., 2023
Abstract Improving irrigation infrastructure is important for sustaining food security in developing countries like India. The irrigation potential of a system is estimated at the planning phase using conventional approaches. A mismatch in the irrigation potential planned to be created and the land suitable for cultivation can lead to a gap in the ...
Annie Maria Issac   +10 more
wiley   +1 more source

SE‐Former: Incorporating sentence embeddings into Transformer for low‐resource NMT

open access: yesElectronics Letters, Volume 59, Issue 11, June 2023., 2023
To leverage SimCSE for low‐resource NMT, in this work incorporating sentence embeddings from SimCSE into the Transformer network is explored and SE‐Former model is proposed. In this model an embed‐fusion module is designed to utilize the output of SimCSE for NMT.
Dongsheng Wang, Shaoyong Wang
wiley   +1 more source

Design of automatic irrigation system of roof greening(屋顶绿化的自动灌溉系统设计)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2007
屋顶绿化对提高城市空气质量、减少“热岛效应”、改善居住环境有积极的意义,但其灌溉环节与普通园林绿化灌溉相比有更高的要求.为了增强屋顶灌溉的科学性,根据其特点提出了建立自动灌溉系统的设想,并对灌溉过程建立了混杂自动机模型,从离散事件动态系统与连续变量动态系统的角度共同描述了自动灌溉的过程,最后给出了自动灌溉系统的工程设计方案,对屋顶绿化自动化、精细化程度的提高具有一定的启示意义.
DUMiao(都淼), XULi-gen(徐礼根)
doaj   +1 more source

渠井结合灌区农户灌溉用水模型的构建与应用

open access: yesShuitu Baochi Xuebao, 2021
在水文模型中耦合准确模拟农户灌溉用水行为的模块可以构建更符合实际的灌区水循环模型,可以定量计算农户灌溉用水对渠井结合灌区水循环的影响。以典型渠井结合灌区——陕西省宝鸡峡灌区为研究区,采用问卷调查与访谈的方式收集了大量的农业生产和农户灌溉用水数据,在深入分析灌溉用水影响因素互馈关系和渠井结合灌区水循环特征的基础上,采用Python语言构建了渠井结合灌区农户灌溉用水模型(HCLU模型),该模型由水文、作物、农户生计和灌溉行为4个模块组成 ...
潘嘉培, 降亚楠
doaj  

磁化水灌溉对土壤水盐分布和春玉米产量的影响

open access: yesShuitu Baochi Xuebao, 2021
以春玉米为研究对象,通过磁化水灌溉试验,研究磁化水灌溉条件下不同灌水量(4 200,4 800,5 400 m3/hm2)对土壤水盐分布、玉米干物质量积累、产量及生长特性的影响,以探寻3 500 Gs磁化强度磁化水灌溉条件下适宜的灌水量,为促进塔里木盆地农业资源高效利用提供相关数据支持。结果表明:不同灌水量下磁化水灌溉均能提高土壤含水量,40—60 cm土层土壤盐分淋洗效果优于0—20 cm土层;磁化水灌溉可促进玉米植株生长及产量增加,各处理磁化水灌溉玉米产量较非磁化处理增加了2.11%~19.31 ...
盛统民, 张胜江, 肖兵
doaj  

灌溉水盐分及灌水量对土壤水盐分布与春玉米生长的影响

open access: yesShuitu Baochi Xuebao, 2022
在大田试验的基础上探明灌溉水盐分以及灌水量对土壤水盐分布的影响规律以及对春玉米生长的影响。以河套灌区春玉米为研究对象,设置2种灌溉水含盐量(1.1,5.0 g/L)与3种灌水量(210,255,300 mm)进行大田试验。结果表明,至成熟期,5.0 g/L微咸水灌溉处理0—100 cm土层土壤平均含水量及电导率相比1.1 g/L地下水灌溉处理显著增加;地下水灌溉处理中,随着灌水量的增加,生育期内土壤平均含水量下降趋势减小,土壤盐分淋洗作用更加明显;微咸水灌溉处理中,剖面土壤在灌水量少时出现盐分表聚现象 ...
张美桃   +5 more
doaj  

咸水灌溉对麦—玉两熟制农田土壤水稳性团聚体的影响

open access: yesShuitu Baochi Xuebao, 2021
为探明咸水灌溉对麦—玉两熟轮作农田土壤团聚体的影响效应,在长期定位咸水灌溉试验(始于2006年)的基础上,研究了不同矿化度咸水连续灌溉第13~14年农田土壤盐分(ECe)及水稳性团聚体分布和稳定性指标的变化规律。试验设置5个灌溉水矿化度处理,分别为1,2,4,6,8 g/L。结果表明,0—40 cm土层土壤ECe随灌溉水矿化度增加而增大,4,6,8 g/L灌水处理与1 g/L处理间差异达显著水平。咸水灌溉改变土壤水稳性团聚体的粒级分布,灌溉水矿化度 ≤ 4 g/L时,0—40 ...
吴雨晴   +6 more
doaj  

灌溉水质对草坪草生理生化特性及质量的影响

open access: yesShuitu Baochi Xuebao, 2005
为了大面积利用再生水灌溉,加大污水资源化力度,确保高质量的都市草坪,在永乐店试验站进行了不同灌溉水源灌溉草坪的试验研究。试验采用3种水源灌溉盆栽草坪:清水灌溉;清水和再生水1:1混合灌溉;再生水灌溉。各处理的灌水时间、灌水次数相同。试验结果表明:再生水灌溉在一定程度上能提高草地早熟禾出苗率,与清水适宜灌相比出苗率提高达29%,能获得较为密致的草坪,确保草坪细腻的质地。当外界气温较高时,与清水灌溉处理相比,再生水灌溉会促使草坪草叶片细胞膜透性、过氧化氢酶活性及脯氨酸含量增大;当外界气温转低时 ...
彭致功 杨培岭 任树梅
doaj   +2 more sources

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