{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T17:06:57Z","timestamp":1789751217073,"version":"4.0.1"},"reference-count":31,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T00:00:00Z","timestamp":1777939200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T00:00:00Z","timestamp":1777939200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42064006"],"award-info":[{"award-number":["42064006"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["ngwa.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Groundwater"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    For a partially penetrating well, a Dirac pulse can be generated by sudden charge of water from the well end into the contiguous rock, and subsequently the pulse diffuses away in terms of slow P\u2010wave. This process is described by the Green's function for the initial\u2010value problem. The Green's functions subject to three boundary conditions (BC) are compared mutually, that is, no BC, zero Neumann BC and zero Dirichlet BC for infinitely far boundary, the confining unit and unconfined aquifer, respectively. The well end is set at 10\u2009m below the boundary, and the mass of water suddenly injected is prescribed as 1\u2009kg. Both intact Berea sandstone and fractured Berea sandstone are used for illustration. The spatial distribution and breakthrough curve of the fluid pressure disturbance (\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>f<\/jats:italic>\n                    <\/jats:sub>\n                    ) are calculated. The results indicate that zero Neumann BC increases\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>f<\/jats:italic>\n                    <\/jats:sub>\n                    whereas zero Dirichlet BC decreases\n                    <jats:italic>p<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic>f<\/jats:italic>\n                    <\/jats:sub>\n                    . For slow and fast P\u2010waves in the regime of low frequency, it is rigorously shown that the ratios (between the confining pressure disturbance and fluid pressure disturbance) are lower than and higher than unity, respectively. This theoretical study suggests that the technique of Dirac pulse may be used for acquisition of small\u2010scale permeability, thus helpful for resolving the heterogeneity of in situ permeability.\n                  <\/jats:p>","DOI":"10.1111\/gwat.70077","type":"journal-article","created":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T16:06:08Z","timestamp":1777997168000},"page":"457-465","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Impacts of Different Boundary Conditions on Dirac Pulse from a Well into Aquifer"],"prefix":"10.1111","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4144-5634","authenticated-orcid":false,"given":"Guangquan","family":"Li","sequence":"first","affiliation":[{"name":"Department of Geophysics Yunnan University  Kunming Yunnan 650504 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuejing","family":"Shen","sequence":"additional","affiliation":[{"name":"Department of Geophysics Yunnan University  Kunming Yunnan 650504 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-6183-3101","authenticated-orcid":false,"given":"Zhongyuan","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Geophysics Yunnan University  Kunming Yunnan 650504 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,5,5]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1029\/WR019i006p01558"},{"key":"e_1_2_10_3_1","volume-title":"Dynamics of Fluids in Porous Media","author":"Bear J.","year":"1972"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1121\/1.1908239"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1121\/1.1908241"},{"key":"e_1_2_10_6_1","volume-title":"The Fourier Transform and Its Applications","author":"Bracewell R.N.","year":"1986"},{"key":"e_1_2_10_7_1","volume-title":"Conduction of Heat in Solids","author":"Carslaw H.","year":"1959"},{"key":"e_1_2_10_8_1","volume-title":"Mechanical Properties of Rocks in the Crust: Theoretical Fundamentals and Experimental Methods","author":"Chen Y.","year":"1988"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1029\/WR003i001p00263"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1190\/1.1437459"},{"key":"e_1_2_10_11_1","volume-title":"Advances in Well Test Analysis. 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